Support for Micronaut 2, misc bug fixes

Unsigned build for jitpack

Version 0.3.0

micronaut-jupyter v0.2.4

- Bugfixes:
    - Correctly build and prepare docs outside of gh-pages branch (deploy latest src)
    - Pull gh-pages before pushing (avoid conflict)
- Issues: #26
          MJ-28

micronaut-jupyter v0.2.3

- Bugfix:
    - Replace Travis CI deploy with custom deploy logic in build.sh (don't overwrite other releases)
- Issues: #26
          MJ-28

micronaut-jupyter v0.2.2

- Setup documentation generation:
  - Use micronaut-docs gradle plugin with AsciiDoctor
  - Generate docs and deploy to GitHub pages using travis-ci
- Issues: #26
          MJ-28

micronaut-jupyter v0.2.1

- Redirect logging output from noteboks to original System.out stream:
  - Potential performance impact
  - Can be disabled by setting new redirectLogOutput property to false
- Split tests tasks into unitTest and integrationTest:
  - Further split integrationTest into gormTest, mdTest, and basicIntegrationTest
  - Use new -Ptests option to filter tests
  - Log warning (with potential false positives) if no tests match filter
  - Overwrite default test task with task that calls subtasks
- Document that some BeakerX functionality will require `beakerx` to be installed separately
- Minor changes and bugfixes:
  - Document Docker requirements in README.md
  - Use package version in docs when including dependency
  - Only decrypt key in travis for non-PR builds (re-organize travis scripts)
  - Include micronaut-inject-java dependencies under annotationProcessor
  - Move KernelExitException stacktrace to TRACE log
  - Fix StackoverFlowError from simultaneously starting many kernels at startup
  - Use micronaut-bom package to set micronaut module versions
  - Document example services with README files
  - Document branches in README
- Issues: #6 #22 #33 #25
          #34 #23 #38
          MJ-17 MJ-22 MJ-34 MJ-27
          MJ-33 MJ-25 MJ-38

micronaut-jupyter v0.2.0

- Access Micronaut beans in Jupyter script using new `service()` method
- Use Micronaut Data repos in Jupyter script
- GORM functionality (data services and dynamic finders)
- New integration-style tests that test notebooks
- Minor changes and bugfixes:
  - Handle a missing SIGNING_GPG_KEY in Gradle build
  - Open up kernel sockets on 0.0.0.0 instead of localhost
- Issues: MJ-2 MJ-3 MJ-7 MJ-16

micronaut-jupyter 0.1.0

- Initial release of the configuration
- Provides Jupyter kernel that can:
  - Run Groovy code and perform BeakerX functions
  - Import classes on the classpath of a Micronaut app
- Issues: MJ-5 MJ-6 MJ-8 MJ-9
          MJ-10 MJ-11 MJ-12 MJ-13
          MJ-14 MJ-15

Only publish for single language build in travis-build.sh (MJ-14)