Preparations for JEP 396: use add-opens command line (#125)

* Set add-opens for java.desktop module via command line for modularized JDK 11
* Make add-opens command line option default to build out of the box with JDK 16 and newer

Increase delay to stabilize test (#120)

Extend demo with custom highlight color on hover (#105)

* Suppress illegal reflective access operation warning during test execution for JDKs using modules
* Extend FullDemo to use custom highlight color for CalendarPanel labels on mouse hover

Add more coverage to TimePicker tests. (#99)

Add more coverage to TimePicker tests and reorganize test into separate class and smaller files.
Prevent a NPE if setText(null) is used and update version number to reflect NPE fix.

Co-authored-by: Archie Black <(A@B)>
Co-authored-by: WiseEagleOwl <53954419+WiseEagleOwl@users.noreply.github.com>

Merge pull request #94 from LGoodDatePicker/releases

Release preparations, bump version number to 11.0.0 and fix Maven Central publishing workflow issues

Updated project number for new release.

Updated project version for release.

Updated project version number.

Minor update to pom file comments.

In the full demo, changed the order of the date pickers.