Merge branch 'feature/shellcheck', bump version to 0.4.0.

.travis.yml

 ---
 language: python
-python: "2.7"
+python: "3.5"
 dist: trusty
 sudo: false
 
+cache:
+  - pip
+  - directories:
+      - $HOME/.pre-commit
+
 install:
   - pip install pre_commit
 

README.rst

@@ -21,9 +21,10 @@ Add the following to your :code:`.pre-commit-config.yaml`:
 .. code:: yaml
 
     - repo: https://www.shore.co.il/git/shell-pre-commit/
-      sha: v0.2.0
+      sha: v0.4.0
       hooks:
       - id: shell-lint
+      - id: shellcheck
 
 And run :code:`pre-commit autoupdate` to update the hooks.
 

VERSION

-0.3.0
\ No newline at end of file
+0.4.0

hooks.yaml

@@ -5,4 +5,10 @@
   language: system
   entry: /bin/sh
   args: ['-en']
-  files: \.(sh|bash|ksh|zsh)$
+  files: &shell_scripts \.(sh|bash|ksh|zsh)$
+- id: shellcheck
+  name: shellcheck
+  description: A shell script static analysis tool
+  language: system
+  entry: shellcheck
+  files: *shell_scripts