1.2.0

• fix: Fails to show codeframe on CSS syntax error (#12)
• refactor: Remove rule name if it is a duplicate of the error message. This happens when the severity is "error".
• feat: Add filename:line:column to each message so editors can ctrl+click to precise location in file
• chore: Tidy readme: fix some makdown lint warnings, add syntax hilighting
• chore: Add test, and install-and-test npm scripts
• chore: Upgrade safe dependencies
• chore: Fix automatically fixable volunerabilities (using npm audit fix)

Thanks for @elektronik2k5 for the great work!