update go.mod to latest release

Author: Frank Martinez

go.mod

@@ -3,7 +3,7 @@ module github.com/project-flogo/flow
 require (
 	github.com/julienschmidt/httprouter v1.2.0
 	github.com/pkg/errors v0.8.1 // indirect
-	github.com/project-flogo/core v0.9.4-rc.2
+	github.com/project-flogo/core v0.9.4
 	github.com/stretchr/testify v1.3.0
 )
 

go.sum

@@ -6,8 +6,8 @@ github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/project-flogo/core v0.9.4-rc.2 h1:EkTTnpE6l8WsH5xGVfe3lb4XOipfsKKvMdpCBqLmYro=
-github.com/project-flogo/core v0.9.4-rc.2/go.mod h1:QGWi7TDLlhGUaYH3n/16ImCuulbEHGADYEXyrcHhX7U=
+github.com/project-flogo/core v0.9.4 h1:WGvXbfVi00Weys+jR2pR3M2hEkxjPpO4NW+WiJJ6Lgg=
+github.com/project-flogo/core v0.9.4/go.mod h1:QGWi7TDLlhGUaYH3n/16ImCuulbEHGADYEXyrcHhX7U=
 github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=