Bump lombok from 1.18.16 to 1.18.18

Bumps lombok from 1.18.16 to 1.18.18.

Changelog

Sourced from lombok's changelog.

v1.18.18 (January 28th, 2021)

• BUGFIX: Various tools using ecj under the hood (including intellij) could cause corrupt class files to be generated. [PR #2637](https://github.com/rzwitserloot/lombok/pull/2637), [lombok-intellij-plugin issue #969](https://github.com/mplushnikov/lombok-intellij-plugin/issues/969).
• BUGFIX: Netbeans would not work with 1.18.16 anymore. [Issue #2612](https://github.com/rzwitserloot/lombok/issues/2612)
• BUGFIX: @ExtensionMethod support in ecj improved when generics are involved. [Issue #2648](https://github.com/rzwitserloot/lombok/issues/2648), [PR #2658](https://github.com/rzwitserloot/lombok/pull/2658) thanks to @Rawi01.
• PLATFORM: using lombok.config files when compiling with sbt 1.4 now works again. [Issue #2645](https://github.com/rzwitserloot/lombok/issues/2645)

Commits

• b9f1f50 [versioning] pre-release version bump of the changelog as well
• 56d54bf [versioning] pre-release version bump
• e6d8665 [trivial] [build] .gitignore the jvm locations cachefile
• eecd1a3 Validate positions during tests
• a234a8e [fixes #2691] Add end positions to all generated nodes
• 04f17f4 Add to AUTHORS.
• 648a56c Improve Javadoc and consistently use SourceVersion.latest().
• 4f36080 Fix inconsistency in lombok.toString.callSuper doc
• 2e5ea51 [fixes #2443] Remove multiline Javadoc tags
• b8d49a8 [fixes #2695] Create void literal properly
• Additional commits viewable in compare view