Removes occam dependency in favor of internal matcher

go.mod

@@ -8,11 +8,13 @@ require (
 	github.com/cheggaaa/pb/v3 v3.0.8
 	github.com/dsnet/compress v0.0.1
 	github.com/gabriel-vasile/mimetype v1.4.0
+	github.com/kr/text v0.2.0 // indirect
+	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/onsi/gomega v1.17.0
-	github.com/paketo-buildpacks/occam v0.1.4
 	github.com/pelletier/go-toml v1.9.4
 	github.com/sclevine/spec v1.4.0
 	github.com/ulikunitz/xz v0.5.10
 	golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d // indirect
 	golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e // indirect
+	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
 )