[0.5.0 - 0.6.0]: Auto-completion hangs sometimes

[EliotVU]

Describe the bug

The Language-Server will sometimes hang and stop responding all together, upon further re-search this occurs if the auto-completion parser hits a block like cpptext { code... }, this appears to cause an infinite loop in the third-party library antlr4-c3.

I have submitted an issue for this at antlr4-c3/issues/74.