v0.6.7

Changelog

8eb6aa7 Add Language Igor (#276)
d122d30 Add ABAP lexer
b964bce Update TradingView lexer to v4 (#279)
5152194 Sync docker lexer to latest Pygments.
2f5349a Add italics support for indexed colour terminals
f2e0513 Add italics support for truecolour terminals
6a3320f Fix several errors with c++
2b493e2 Fix SCSS issue with comments.
a5a6d52 Use chroma.StyleEntries instead of map
70b7419 Add EnsureNL in TypeScript lexer config
65b5eea Adds .fth extension for Forth.
f8432cf Update issue templates
b1f0162 Update issue templates
e6a5665 Add width:100% to content when inlining styles.