chore(deps): bump github.com/golang/mock from 1.4.3 to 1.4.4

Bumps [github.com/golang/mock](https://github.com/golang/mock) from 1.4.3 to 1.4.4.
- [Release notes](https://github.com/golang/mock/releases)
- [Changelog](https://github.com/golang/mock/blob/master/.goreleaser.yml)
- [Commits](golang/mock@v1.4.3...v1.4.4)

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

go.mod

@@ -4,7 +4,7 @@ go 1.13
 
 require (
 	github.com/caos/logging v0.0.0-20191210002624-b3260f690a6a
-	github.com/golang/mock v1.4.3
+	github.com/golang/mock v1.4.4
 	github.com/google/go-cmp v0.4.1 // indirect
 	github.com/google/go-github/v31 v31.0.0
 	github.com/google/uuid v1.1.1

go.sum

@@ -6,6 +6,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/golang/mock v1.4.3 h1:GV+pQPG/EUUbkh47niozDcADz6go/dUwhVzdUQHIVRw=
 github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.4.4 h1:l75CXGRSwbaYNpl/Z2X1XIIAMSCquvXgpVZDhwEIJsc=
+github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=