chore(deps): bump the go group with 3 updates

Bumps the go group with 3 updates: [github.com/evanphx/json-patch](https://github.com/evanphx/json-patch), [github.com/stretchr/testify](https://github.com/stretchr/testify) and [golang.org/x/oauth2](https://github.com/golang/oauth2).


Updates `github.com/evanphx/json-patch` from 0.5.2 to 5.9.0+incompatible
- [Release notes](https://github.com/evanphx/json-patch/releases)
- [Commits](evanphx/json-patch@v0.5.2...v5.9.0)

Updates `github.com/stretchr/testify` from 1.8.1 to 1.9.0
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.8.1...v1.9.0)

Updates `golang.org/x/oauth2` from 0.11.0 to 0.20.0
- [Commits](golang/oauth2@v0.11.0...v0.20.0)

---
updated-dependencies:
- dependency-name: github.com/evanphx/json-patch
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: go
- dependency-name: github.com/stretchr/testify
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: go
- dependency-name: golang.org/x/oauth2
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: go
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -3,9 +3,12 @@ module github.com/labd/amplience-go-sdk
 go 1.15
 
 require (
-	github.com/evanphx/json-patch v0.5.2
+	github.com/evanphx/json-patch v5.9.0+incompatible
+	github.com/kr/pretty v0.3.0 // indirect
 	github.com/mitchellh/mapstructure v1.5.0
-	github.com/stretchr/testify v1.8.1
-	golang.org/x/net v0.17.0 // indirect
-	golang.org/x/oauth2 v0.11.0
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/rogpeppe/go-internal v1.9.0 // indirect
+	github.com/stretchr/testify v1.9.0
+	golang.org/x/oauth2 v0.20.0
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 )