chore(deps): bump github.com/bluekeyes/go-gitdiff from 0.7.1 to 0.7.3

Bumps [github.com/bluekeyes/go-gitdiff](https://github.com/bluekeyes/go-gitdiff) from 0.7.1 to 0.7.3.
- [Release notes](https://github.com/bluekeyes/go-gitdiff/releases)
- [Commits](bluekeyes/go-gitdiff@v0.7.1...v0.7.3)

---
updated-dependencies:
- dependency-name: github.com/bluekeyes/go-gitdiff
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -2,7 +2,7 @@ module github.com/jenkins-x/go-scm
 
 require (
  code.gitea.io/sdk/gitea v0.14.0
- github.com/bluekeyes/go-gitdiff v0.7.1
+ github.com/bluekeyes/go-gitdiff v0.7.3
  github.com/go-git/go-billy/v5 v5.5.0
  github.com/go-git/go-git/v5 v5.12.0
  github.com/google/go-cmp v0.6.0

go.sum

@@ -11,8 +11,8 @@ github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFI
 github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
-github.com/bluekeyes/go-gitdiff v0.7.1 h1:graP4ElLRshr8ecu0UtqfNTCHrtSyZd3DABQm/DWesQ=
-github.com/bluekeyes/go-gitdiff v0.7.1/go.mod h1:QpfYYO1E0fTVHVZAZKiRjtSGY9823iCdvGXBcEzHGbM=
+github.com/bluekeyes/go-gitdiff v0.7.3 h1:SElKwtm/IQPOwKs0vdowW5uAlip+P+jatagmUU8E0r4=
+github.com/bluekeyes/go-gitdiff v0.7.3/go.mod h1:QpfYYO1E0fTVHVZAZKiRjtSGY9823iCdvGXBcEzHGbM=
 github.com/bwesterb/go-ristretto v1.2.3/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
 github.com/cloudflare/circl v1.3.3/go.mod h1:5XYMA4rFBvNIrhs50XuiBJ15vF2pZn4nnUKZrLbUZFA=
 github.com/cloudflare/circl v1.3.7 h1:qlCDlTPz2n9fu58M0Nh1J/JzcFpfgkFHHX3O35r5vcU=