Merge pull request #137 from phil-davis/prepare-6.0.1

prepare release 6.0.1

Merge pull request #133 from phil-davis/prepare-5.1.7

chore: prepare release 5.1.7

Merge pull request #129 from phil-davis/prepare-5.1.6

Prepare 5.1.6

Merge pull request #127 from phil-davis/prepare-5.1.5

Prepare 5.1.5

Merge pull request #98 from phil-davis/prepare-6.0.0

Prepare 6.0.0

Merge pull request #93 from phil-davis/prepare-5.1.4

changelog and VERSION bump for 5.1.4

Merge pull request #88 from TysonAndre/patch-1

Pass null to $microseconds for null $seconds

Merge pull request #83 from phil-davis/prepare-release-5.1.2

Release 5.1.2

Prepare next release (#80)

* Prepare next release

* Update CHANGELOG.md

Release 5.1.0 (#71)

* Update CHANGELOG.md

* Update Version.php