fixup! Add basic attempt at local module handling

Try and fix Windows test failures. I don't have access to a Windows
machine right now, but hopefully this works

Signed-off-by: Matthew Hughes <matthewhughes934@gmail.com>

pkg/gci/testdata/module/.gitattributes

@@ -0,0 +1,4 @@
+# try and stop git running on Windows from converting line endings from 
+# in all Go files under this directory. This is to avoid inconsistent test
+# results when `gci` strips "\r" characters
+**/*.go eol=lf