Bump checkstyle from 8.45.1 to 9.0

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.45.1 to 9.0.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.45.1...checkstyle-9.0)

---
updated-dependencies:
- dependency-name: com.puppycrawl.tools:checkstyle
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

AdoptOpenJDK is moving to the Eclipse Foundation and rebranding as
Eclipse Temurin.

Merge branch 'pr-246'

This closes #246

Bump checkstyle from 8.45 to 8.45.1

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.45 to 8.45.1.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.45...checkstyle-8.45.1)

---
updated-dependencies:
- dependency-name: com.puppycrawl.tools:checkstyle
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump commons.jacoco.version from 0.8.6 to 0.8.7.

Set commons.release.version to current version.

Merge branch 'master' of https://gitbox.apache.org/repos/asf/commons-collections.git

Bump checkstyle from 8.44 to 8.45 #245.

Bump checkstyle from 8.44 to 8.45 (#245)

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.44 to 8.45.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.44...checkstyle-8.45)

---
updated-dependencies:
- dependency-name: com.puppycrawl.tools:checkstyle
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Javadoc tweaks.

Add ListUtils.getFirst() and getLast().

Sort by type.

Sort members.

Update tests from commons-io:commons-io 2.10.0 to 2.11.0.

Remove dead in-line comments.

Use final.

Simplify expressions.

Update my developer entry.

Merge branch 'pr-243'

This closes #243

Bump checkstyle from 8.43 to 8.44

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.43 to 8.44.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.43...checkstyle-8.44)

---
updated-dependencies:
- dependency-name: com.puppycrawl.tools:checkstyle
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Merge branch 'pr-240'

This closes #240

Bump checkstyle from 8.42 to 8.43

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.42 to 8.43.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.42...checkstyle-8.43)

Signed-off-by: dependabot[bot] <support@github.com>

Update Apache Commons IO from 2.9.0 to 2.10.0.

Merge branch 'pr-239'

This closes #239

Bump actions/cache from 2.1.5 to 2.1.6

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.5 to 2.1.6.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](https://github.com/actions/cache/compare/v2.1.5...v2.1.6)

Signed-off-by: dependabot[bot] <support@github.com>

Update commons-io 2.8.0 -> 2.9.0.

Merge branch 'pr-237'

This closes #237

[COLLECTIONS-786] Changelog

[COLLECTIONS-786] Fix PassiveExpiringMap documentation

Merge branch 'pr-236'

This closes #236

Bump commons.junit.version from 5.7.1 to 5.7.2

Bumps `commons.junit.version` from 5.7.1 to 5.7.2.

Updates `junit-jupiter-api` from 5.7.1 to 5.7.2
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](https://github.com/junit-team/junit5/compare/r5.7.1...r5.7.2)

Updates `junit-jupiter-engine` from 5.7.1 to 5.7.2
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](https://github.com/junit-team/junit5/compare/r5.7.1...r5.7.2)

Updates `junit-vintage-engine` from 5.7.1 to 5.7.2
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](https://github.com/junit-team/junit5/compare/r5.7.1...r5.7.2)

Signed-off-by: dependabot[bot] <support@github.com>

Add GitHub code of conduct page that points to the Apache page.

Merge branch 'pr-235'

This closes #235

Add Checkstyle syntax fix to changelog with link to PR (issue is COMMONSSITE-145)

Upgrade Checkstyle syntax (was scope, now it is accessModifiers) fixing CI build.

Merge branch 'pr-234'

This closes #234

Bump checkstyle from 8.41.1 to 8.42

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.41.1 to 8.42.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.41.1...checkstyle-8.42)

Signed-off-by: dependabot[bot] <support@github.com>

Merge branch 'pr-226'

This closes #226

Bump easymock from 4.2 to 4.3

Bumps [easymock](https://github.com/easymock/easymock) from 4.2 to 4.3.
- [Release notes](https://github.com/easymock/easymock/releases)
- [Changelog](https://github.com/easymock/easymock/blob/master/ReleaseNotes.md)
- [Commits](https://github.com/easymock/easymock/compare/easymock-4.2...easymock-4.3)

Signed-off-by: dependabot[bot] <support@github.com>

Merge branch 'pr-225'

This closes #225

Bump actions/cache from v2.1.4 to v2.1.5

Bumps [actions/cache](https://github.com/actions/cache) from v2.1.4 to v2.1.5.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](https://github.com/actions/cache/compare/v2.1.4...1a9e2138d905efd099035b49d8b7a3888c653ca8)

Signed-off-by: dependabot[bot] <support@github.com>

Merge pull request #224 from kinow/update-setup-java

Update actions/setup-java to v2

Update actions/setup-java to v2

RAT exclude .asf.yaml

Fix repo description

Merge branch 'pr-222'

This closes #222

Bump checkstyle from 8.41 to 8.41.1

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.41 to 8.41.1.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.41...checkstyle-8.41.1)

Signed-off-by: dependabot[bot] <support@github.com>

Replace GitHub build for Java 15 with Java 16 and drop Java 16-ea.

No need to nest in else.

Merge branch 'pr-217'

This closes #217

[COLLECTIONS-785] Add changelog

[COLLECTIONS-785] Add constant variable

Merge branch 'pr-219'

This closes #219

Bump commons-lang3 from 3.11 to 3.12.0

Bumps commons-lang3 from 3.11 to 3.12.0.

Signed-off-by: dependabot[bot] <support@github.com>

Merge branch 'pr-218'

This closes #218

Bump checkstyle from 8.40 to 8.41

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.40 to 8.41.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.40...checkstyle-8.41)

Signed-off-by: dependabot[bot] <support@github.com>

Use varargs.

Raise embedded if into parent if.

Remove use of redundant String.substring() parameter.

Remove trailing whitespace.

Add INDEX_NOT_FOUND constant #210.

[COLLECTIONS-781] - INDEX_NOT_FOUND Constant (#210)

* COLLECTIONS-781 - INDEX_NOT_FOUND Constant

* Update CollectionUtils.java

Javadoc.

Co-authored-by: Gary Gregory <garydgregory@users.noreply.github.com>

Merge branch 'pr-213'

This closes #213

Bump actions/cache from v2 to v2.1.4

Bumps [actions/cache](https://github.com/actions/cache) from v2 to v2.1.4.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](https://github.com/actions/cache/compare/v2...26968a09c0ea4f3e233fdddbafd1166051a095f6)

Signed-off-by: dependabot[bot] <support@github.com>

Merge branch 'pr-213'

This closes #213

Bump commons.junit.version from 5.7.0 to 5.7.1

Bumps `commons.junit.version` from 5.7.0 to 5.7.1.

Updates `junit-jupiter-api` from 5.7.0 to 5.7.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](https://github.com/junit-team/junit5/compare/r5.7.0...r5.7.1)

Updates `junit-jupiter-engine` from 5.7.0 to 5.7.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](https://github.com/junit-team/junit5/compare/r5.7.0...r5.7.1)

Updates `junit-vintage-engine` from 5.7.0 to 5.7.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](https://github.com/junit-team/junit5/compare/r5.7.0...r5.7.1)

Signed-off-by: dependabot[bot] <support@github.com>

[COLLECTIONS-779] Migrate assert to Assertions #209.

COLLECTIONS-779 - Migrate assert to Assertions (#209)

Use the scale in the var name.

Merge branch 'pr-211'

This closes #211

Bump maven-checkstyle-plugin from 3.1.1 to 3.1.2

Bumps [maven-checkstyle-plugin](https://github.com/apache/maven-checkstyle-plugin) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/apache/maven-checkstyle-plugin/releases)
- [Commits](https://github.com/apache/maven-checkstyle-plugin/compare/maven-checkstyle-plugin-3.1.1...maven-checkstyle-plugin-3.1.2)

Signed-off-by: dependabot[bot] <support@github.com>

Merge branch 'pr-212'

This closes #212

Bump checkstyle from 8.39 to 8.40

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.39 to 8.40.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.39...checkstyle-8.40)

Signed-off-by: dependabot[bot] <support@github.com>

Remove '_' from private names.

Use isEmpty().

Use isEmpty().

Use isEmpty().

Sort methods.

Define and reuse constants.

Minor Improvements #208.

Minor Improvements: (#208)

* Add final
* Remove Redundant initializer
* fix javadoc
* Array initializer empty

Bump checkstyle from 8.38 to 8.39 #204.

Bump checkstyle from 8.38 to 8.39 (#204)

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.38 to 8.39.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-8.38...checkstyle-8.39)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Merge branch 'pr-207'

This closes #207

[COLLECTIONS-780] changelog

[COLLECTIONS-780] Use assertThrows V2

Merge branch 'pr-206'

This closes #206

[COLLECTIONS-778] changelog

[COLLECTIONS-778] Use assertThrows

Fix Checkstyle suppressions DTD link.

Fix Checkstyle suppressions DTD link.

Fix Checkstyle configuration DTD link.

Collapse multiple identical catch clauses into one.

Use caches.

Use Character cache.

Add Java 17-EA to the GitHub build.

Fix typo erroring -> erring #202.

fix typo erroring -> erring (#202)

Minor Improvements #203.

Minor Improvement: (#203)

* Add final
* Unnecessary semicolon ';'

Fix Checkstyle.