Added support for project merge_method

• Added support for project merge_method (#174)

Enhancement Release

• Added file upload and push rules support (#172)
• Can now operate on tag lists when creating or updating a project (#172)
• Fixed enableRunner (#173)

CommitsApi Enhancements and Block User Fixes

• Add a variation of the getCommits() method that supports Paging and a path #167
• Fixed UserApi bloackUser() and unblockUser() #169

RunnersApi, ProtectedBranchesApi, and Secure Passwords

• Added RunnersApi (#154)
• Added ProtectedBranchesApi (#156)
• Now uses CharSequence and char[] for password parameters (#157)

Fixed Handling of Webhook Dates

• Fixed handling of the invalid ISO8601 and XSD dates that may be present in the webhook events (#151)

Minor bug fix release

#149 Failed to map MergeRequest note event string to Object
#147 Added PipelineStatus.MANUAL
#146 Support for new arguments in createMergeRequest method

Added NotificationSettingsApi

gitlab4j-api-4.8.4

[maven-release-plugin] copy for tag gitlab4j-api-4.8.4

Added Support for Working with Merge Request Notes

gitlab4j-api-4.8.3

[maven-release-plugin] copy for tag gitlab4j-api-4.8.3

Added Proxy Server Support

• Mods to support using a proxy server (#141).
• Added getOptionalMergeRequest().
• Misc bug fixes.

Java 8 and Optional<> Support

• Now requires Java 8.
• Added support for Optional<> getOptionalXyz() methods (#127).