Fixes Blackfriday issue; provides explicit v2

[rickb777]

This PR removes all reference to gopkg.in origin for blackfriday, because it is problematic. Direct reference to blackfriday via github.com works fine.

Also this PR adds a v2 folder, in line with the Go modules specification for semver versioned code that is > v1.

When merging, please note that the first line of go.mod should stay matcornic, i.e.

module github.com/matcornic/hermes/v2

This PR should resolve issue #67 .

[rickb777]

Perhaps the last v1 code ought to be re-instated in the top-level folder. Also, it is possible to handle v2, v3 ... etc using tags instead of folders.

See https://blog.golang.org/v2-go-modules

[ghost]

please accept this

[Z-a-r-a-k-i]

I guess it won't be accepted until the codebeat gets green.
Waiting for a satisfying solution for @matcornic we have to add replace gopkg.in/russross/blackfriday.v2 => github.com/russross/blackfriday/v2 v2.0.1 into go.mod, I hope that there won't be any other side-effect

edit: nvm doesn't work on go mod tidy (go: github.com/russross/blackfriday/[email protected] used for two different module paths (github.com/russross/blackfriday/v2 and gopkg.in/russross/blackfriday.v2), what the heck I can't find any single way to make it work. Should we consider this package as deprecated and use some less cool alternatives ?

edit: nvm again => #67 (comment)

TLDR: using import "github.com/matcornic/hermes/v2" instead of import "github.com/matcornic/hermes fixed the issue for me

[ChronosMasterOfAllTime]

fixed in https://github.com/go-hermes/hermes