bunt release v1.3.0

66905ea Add more sanity checks for testing GitHub action
2da738f Refine ForegroundFunc style option
b8642b4 Refactor blend code to be more reusable
5fc2fdd Add draft for GitHub Action for releases
b7afa72 Add GitHub Action for testing
9bef6ed Add support for move cursor left sequences
27d3674 Fix failing test case due to colorful package bump
22ce0be Bump github.com/lucasb-eyer/go-colorful from 1.0.3 to 1.2.0
58934fe Bump github.com/onsi/gomega from 1.10.4 to 1.10.5
2453c29 Bump github.com/onsi/ginkgo from 1.14.2 to 1.15.0
6200079 Remove concurrent tests in Travis
728e37e Add ForegroundFunc style option