tests: add git default username and email

Author: detailyang

.pre-commit-config.yaml

@@ -1,4 +1,4 @@
 -   repo: /Users/detailyang/art/opensource/personal/pre-commit-shell
-    sha: 3e118275d431f939f602cebe0de14289abe5398a
+    sha: a257808093def4b815db6924b62e806b88011e91
     hooks:
     -   id: shell-lint

test/init.sh

@@ -18,6 +18,8 @@ cp test/test.sh "$tmpdir"
 cp test/.pre-commit-config.yaml "$tmpdir"
 cp test/.pre-commit-hooks.yaml "$tmpdir"
 pushd "$tmpdir"
+git config --global user.email "detailyang@gmail.com"
+git config --global user.name "detailyang"
 git init
 git add .pre-commit-config.yaml .pre-commit-hooks.yaml --all ; git commit -a -m "init test case"
 pre-commit install