v1.2.0

New features:

• feat(experimental): add support for lang parsing (#14)

Documentation:

• docs(contributing): update contributing docs with commit style guide (#22)

Other updates:

• refactor(validation): add assertion functions (#23)
• style: add *.html to prettier formatting (#21)
• chore: add .prettierignore (#19)
• ci: only trigger on push for master (#18)
• chore(typings): switch custom typings to parse5 (#17)
• chore: add .editorconfig