bump dependencies

go.mod

@@ -2,17 +2,16 @@ module github.com/go-openapi/runtime
 
 require (
 	github.com/docker/go-units v0.4.0
-	github.com/go-openapi/analysis v0.19.10
-	github.com/go-openapi/errors v0.19.6
-	github.com/go-openapi/loads v0.19.5
-	github.com/go-openapi/spec v0.19.8
-	github.com/go-openapi/strfmt v0.19.5
-	github.com/go-openapi/swag v0.19.9
-	github.com/go-openapi/validate v0.19.10
+	github.com/go-openapi/analysis v0.20.1
+	github.com/go-openapi/errors v0.20.1
+	github.com/go-openapi/loads v0.21.0
+	github.com/go-openapi/spec v0.20.4
+	github.com/go-openapi/strfmt v0.21.0
+	github.com/go-openapi/swag v0.19.15
+	github.com/go-openapi/validate v0.20.3
 	github.com/opentracing/opentracing-go v1.2.0
-	github.com/stretchr/testify v1.6.1
-	gopkg.in/yaml.v2 v2.3.0
-	gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 // indirect
+	github.com/stretchr/testify v1.7.0
+	gopkg.in/yaml.v2 v2.4.0
 )
 
 go 1.15