v0.2.7

Changelog

• fix #134 - support env context in steps and include base_ref & head_ref
• merge #135 - bump golang to 1.14
• fix #141 - use host network to match GH Actions
• fix #122 - support actions/checkout for other repos
• fix #132 - add chocolatey install
• fix #50 - exclude everything in .gitignore
• c439a6f - support nested expressions
• 3baf626 - include file mode/mod_time when cp into container
• fix #149 - support step.working-directory
• fix #150 - disable dryrun in git clone