feat: improved syntax highlighting (#112)

* feat: improving syntax highlighting

* patch: fix numeric suffixes not being recognized via lexer

* test: add test for parser/lexer for numeric suffixes

* patch: add chained highlighting in yield expressions

* patch: numeric prefix identifier recognition in lexer

* patch: signal highlighting now as method call coloring

* patch: method call highlighting chained to object creation

* patch: chaining nested stuff to object creation

* patch: method call && var highlighting chained to object creation

* patch: highlight fallback for existing but out-of-range identifiers

* patch: numeric identifiers starting with @ and only containing one digit after

* patch: allow default keyword in member part, support hex float literal

* patch: numeric-starting literals in vapis

* chore: remove unused file RetryHighlightElement.java

* chore: add completed tasks to changelog

Author: Tbusk

CHANGELOG.md

@@ -6,7 +6,7 @@
 
 ### What's Changed
 
--
+- Improved syntax highlighting (declarations, identifier, reference, etc.)
 
 ## [1.2.4-ALPHA]