fixup! ci: Fix build

pre-commit not installed

Signed-off-by: 林博仁(Buo-ren Lin) <[email protected]>

Author: brlin-tw

.travis.yml

@@ -43,6 +43,8 @@ install:
 - which -a shellcheck
 - shellcheck --version
 
+- pip install --user pre-commit
+
 before_script:
 - git lfs install # Install Git LFS config, which makes LFS files not making Git considered as "dirty"
 - git lfs pull