build(deps): bump github.com/getkin/kin-openapi from 0.30.0 to 0.31.0

Bumps [github.com/getkin/kin-openapi](https://github.com/getkin/kin-openapi) from 0.30.0 to 0.31.0.
- [Release notes](https://github.com/getkin/kin-openapi/releases)
- [Commits](getkin/kin-openapi@v0.30.0...v0.31.0)

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

go.mod

@@ -20,7 +20,7 @@ require (
 	github.com/fortytw2/leaktest v1.3.0
 	github.com/frankban/quicktest v1.11.2
 	github.com/fsnotify/fsnotify v1.4.9
-	github.com/getkin/kin-openapi v0.30.0
+	github.com/getkin/kin-openapi v0.31.0
 	github.com/ghodss/yaml v1.0.0
 	github.com/gobwas/glob v0.2.3
 	github.com/gohugoio/testmodBuilder/mods v0.0.0-20190520184928-c56af20f2e95

go.sum

@@ -151,8 +151,8 @@ github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
-github.com/getkin/kin-openapi v0.30.0 h1:RAaggqVsRxj2t5vKDrOPcLxA9x8TBDDzYrStzFEHxt4=
-github.com/getkin/kin-openapi v0.30.0/go.mod h1:WGRs2ZMM1Q8LR1QBEwUxC6RJEfaBcD0s+pcEVXFuAjw=
+github.com/getkin/kin-openapi v0.31.0 h1:FUFJeRzKmBwTVZkn8FlgY0g7BfO+l3HniKmx6ANTOhU=
+github.com/getkin/kin-openapi v0.31.0/go.mod h1:WGRs2ZMM1Q8LR1QBEwUxC6RJEfaBcD0s+pcEVXFuAjw=
 github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=