Update target platforms with eclipse 2019-09 (4.14)

Simantics currently uses Eclipse 4.7. Current Eclipse version is 4.14 (2019-12). We should update.

Note that since Eclipse 4.13 org.eclipse.core.runtime no longer re-exports package javax.inject (https://bugs.eclipse.org/bugs/show_bug.cgi?id=547877) so bundles needing that package must import that package separately.