v0.7.8

Fixes:

• Partial support for #rrggbbaa CSS Level 4 colors with alpha (@charlymz)
• Avoid infinitely duplicating parts when extending selector (@cyberalien)
• Fix rooted SCSS URIs normalized incorrectly with double slashes (@evanceit)
• Coding style updates (@brainfoolong)
• Interpolation support selector (@jakejohns, @Cerdic)
• Improve error messages (@gabor-udvari, @Cerdic)
• Fix font shorthand syntax (@JanST123, @Cerdic)
• Peephole optimizations (@oyejorge, @Cerdic)
• Compiler: change some private properties/methods to protected (@cyberalien)
• Fix for "continue" causing PHP 7.3 warning (@darkain)
• Fix error thrown from strpos if needle (basePath) is empty (@evanceit)
• Fix doc for addImportPath, should also accept callable as input (@nguyenk)
• Change Base64 VLQ encoder/decoder implementation
• Generate inline sourcemap in command-line (@dexxa)
• Fix backslash escape (@bastianjoel)