v2: Add go.mod (#487)

bep · rtfb · commit d3b5b032dc8e · 2018-09-20T20:16:15.000+03:00
diff --git a/go.mod b/go.mod
@@ -0,0 +1 @@
+module github.com/russross/blackfriday/v2

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+module github.com/russross/blackfriday/v2`