fix: respect --manifest-path argument

Full Changelog: v0.2.0...v0.2.1

Add command ine flag to deny features

Added

• command line flag --deny or -d adds features to the deny-list

Changed

• -d used to be short for --dry-run, it's now short for --deny

Add README file

Added

• README file documents command line parameters and config options

Initial Release

v0.1.0

(cargo-release) cargo-feature-matrix version 0.1.0