Pass filenames to pre-commit hook

This is an alternative to having the hook run always over all
appropriate files, this means:

* We can configure `pre-commit` to exclude[1] certain files. This is my
  main motivation since I'm wanting to use this hook in a repo with a Go
  file with an intentional syntax error[2]
* We only run `golines` over changed files, this could speed things up
  in repos that have a very large number of Go files

The shortopt was also replace with a long one for readability

[1] https://pre-commit.com/#top_level-exclude
[2] https://gitlab.com/matthewhughes/go-cov/-/blob/81a617e1c8151f6f02f7118de80f1bffd123bfc3/testdata/syntax-error/syntax_error.go#L5

Author: matthewhughes934

.pre-commit-hooks.yaml

@@ -1,7 +1,6 @@
 - id: golines
   name: golines
   description: A golang formatter that fixes long lines.
-  entry: golines . -w
+  entry: golines --write-output
   types: [go]
   language: golang
-  pass_filenames: false