Add go.mod
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..94d5055
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,8 @@
+module github.com/maruel/ut
+
+go 1.11
+
+require (
+	github.com/kr/pretty v0.1.0
+	github.com/pmezard/go-difflib v1.0.0
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..3737411
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,7 @@
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=