Bump github.com/tdewolff/minify/v2 from 2.9.19 to 2.9.21

Bumps [github.com/tdewolff/minify/v2](https://github.com/tdewolff/minify) from 2.9.19 to 2.9.21.
- [Release notes](https://github.com/tdewolff/minify/releases)
- [Commits](https://github.com/tdewolff/minify/compare/v2.9.19...v2.9.21)

---
updated-dependencies:
- dependency-name: github.com/tdewolff/minify/v2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/prometheus/client_golang v1.11.0
 	github.com/rylans/getlang v0.0.0-20200505200108-4c3188ff8a2d
 	github.com/stretchr/testify v1.6.1 // indirect
-	github.com/tdewolff/minify/v2 v2.9.19
+	github.com/tdewolff/minify/v2 v2.9.21
 	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
 	golang.org/x/net v0.0.0-20210614182718-04defd469f4e
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d

go.sum

@@ -221,8 +221,8 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/tdewolff/minify/v2 v2.9.19 h1:QdCQhIqCeBnSWU/4e0nJ8QJeQUNO5CC7jrH3xwETkVI=
-github.com/tdewolff/minify/v2 v2.9.19/go.mod h1:PoDBts2L7sCwUT28vTAlozGeD6qxjrrihtin4bR/RMM=
+github.com/tdewolff/minify/v2 v2.9.21 h1:nO4s1PEMy7aRjlIlbr3Jgr+bJby8QYuifa2Vs2f9lh4=
+github.com/tdewolff/minify/v2 v2.9.21/go.mod h1:PoDBts2L7sCwUT28vTAlozGeD6qxjrrihtin4bR/RMM=
 github.com/tdewolff/parse/v2 v2.5.19 h1:Kjaj3KQOx/4elIxlBSglus4E2oMfdROphvbq2b+OBZ0=
 github.com/tdewolff/parse/v2 v2.5.19/go.mod h1:WzaJpRSbwq++EIQHYIRTpbYKNA3gn9it1Ik++q4zyho=
 github.com/tdewolff/test v1.0.6 h1:76mzYJQ83Op284kMT+63iCNCI7NEERsIN8dLM+RiKr4=