Fix package URL

• Fix package.json URL. Props @tomteman

Release v0.3.0

• Made 'output' optional (default false). Props @spacedawwwg.
• Fixed 'matchParent' option ignoring rules without parent. Props @spacedawwwg.

v0.2.0

• Add option to match parent nodes of declarations.
• Add option to unwrap declarations of matched @media nodes.
• Add some basic tests.