upgraded github_flavored_markdown and version bump

clean up sub modules for buffalo v1

updated module dependencies

Merge pull request #20 from gochigo/updae-modules

updated modules (flect and tags) and fixed github action

Merge pull request #19 from gochigo/update-gfm-tags

updated modules (github_flavored_markdown and tags)

Merge pull request #17 from gobuffalo/feature-adding-default-helper

Adding default helper

Merge pull request #13 from gobuffalo/update-tags

update tags

Merge pull request #12 from gobuffalo/better-deps

github actions

Merge pull request #11 from gobuffalo/actions

github actions

version bump: v0.4.0