release: 6.0.0

style: revert arrow callback function

refactor: change manifest option to accept Buffer (#53)

BREAKING CHANGE: The `manifest` option no longer accepts a stream, only a Buffer. This alligns the plugin with Gulp's guidelines.

fix: correct faulty delimiter

Change inadvertently introduced by switching to XO 0.28.0. Closes #37.

fix: support quoteless html atributes (#30)

fix: avoid corrupting binary files

refactor: drop Node 8 support

BREAKING CHANGE: dropped Node 8 support

ci: remove node 6 and add node 12 to travis

fix: allow replacing in query parameters

Fixes #17.

fix: downgrade malicious depDependency