Add additional pre-commit hooks (#245)

* Add and run end-of-file-fixer
* Add and run trailing-whitespace
* Add and run check-yaml
* Add and run check-json
* Add and run pretty-format-yaml
* Fix comment indentation

pyscriptjs/environment.yml

@@ -1,12 +1,12 @@
 channels:
-  - defaults
-  - conda-forge
+-   defaults
+-   conda-forge
 dependencies:
-  - python=3.9
-  - pip=20.2.2
-  - pytest=7
-  - nodejs=16
-  - black
-  - isort
-  - codespell
-  - pre-commit
+-   python=3.9
+-   pip=20.2.2
+-   pytest=7
+-   nodejs=16
+-   black
+-   isort
+-   codespell
+-   pre-commit