update version and changelog in readme

support punyfont "_ENV" which is the pico8 environment

fix: check function name null string

fix out of range index in entities list when refreshing

updated embedded pico8 API descriptions

update cheatsheet URL

update to .net 4.8

updated readme for https URLs

updated change log and version number to 1.8

Merge pull request #10 from nosnibor28/bugfix/9-MultilineComments

Rearranged style application so strings within comments are formatted properly

Changed HighlightingRangeType to VisibleRange and updated multiline comment regex

updated readme

updated syntax highlighter keywords list

disabled highlighting for default lua multiline comments to avoid highlighting bug when indexing multidimensional arrays (#8)