Make more declarations internal

[lppedd]

Reasoning:

• synchronized: it's there because of a 1:1 translation from the Java runtime.
  I want to be free to swap it with kotlinx-atomicfu utilities at some point.
• codepoint functions: we only use those functions in very specialized places, and making them internal means we can also make them inline.
• assert: same reasoning as synchronized. At some point the Kotlin stdlib will offer a proper multiplatform assert.
• Collections: it's there because of a 1:1 translation from the Java runtime. I want to be able to get rid of it anytime.
• CopyOnWriteArrayList, IdentityHashMap, WeakHashMap: internal details that might be changed anytime.

[lppedd]

Once this is merged I'd say 1.0.0 is good to go.
A GitHub Release (even without artifacts) could be useful to notify everyone that starred the repo.

[ftomassetti]

Looks good. Let me merge this one and release 1.0.0. I guess we can always expose something later, if needed

[lppedd]

@ftomassetti thanks! Yes, the idea is to close now, to open up later if necessary.

[ftomassetti]

@lppedd 1.0.0 should now be out!

[lppedd]

@ftomassetti just updated our projects to 1.0.0 and it's all good, thanks!
I guess you could open a Release, otherwise tags don't come up in the GitHub feed.

[ftomassetti]

@ftomassetti just updated our projects to 1.0.0 and it's all good, thanks! I guess you could open a Release, otherwise tags don't come up in the GitHub feed.

Done: https://github.com/Strumenta/antlr-kotlin/releases/tag/1.0.0