Chanfig

Commits
- a03eb1b: do not use custom __init__ for FlatDict (Zhiyuan Chen)
- 0e88674: Refactor merge, remove _init (Zhiyuan Chen)
- 97372bc: support type annotations (Zhiyuan Chen)
- 6f67f65: add pre-commit config (Zhiyuan Chen)
- 3155769: temp solution for rich (Zhiyuan Chen)
- ed7b122: support strong check for variables (Zhiyuan Chen)
- 7e26c51: Update lint options (Zhiyuan Chen)
- 01e3eff: improve imports (Zhiyuan Chen)

Commits
- 34c15d3: update docs (Zhiyuan Chen)
- ef07f4b: expose GlobalRegistry at top level (Zhiyuan Chen)
- 3ab3ed5: fix __contains__ does not work for Variable (Zhiyuan Chen)

Commits
- e6ffcf3: [minor] improve docs (Zhiyuan Chen)
- 3f50f93: fix all_keys/all_items raises TypeError when key is not str (Zhiyuan Chen)
- a04521d: call set instead of __setitem__ in merge (Zhiyuan Chen)
- e69fd72: add locked which temporarily lockes config (Zhiyuan Chen)
- ffe7115: improve doctest (Zhiyuan Chen)
- c05461a: improve lints (Zhiyuan Chen)
- f39d62a: iter through property in NestedDict.set (Zhiyuan Chen)
- bb727e8: call magic methods in get/set (Zhiyuan Chen)
- 1fc95e5: improve docs (Zhiyuan Chen)
- e7d9001: support args and kwargs in apply (Zhiyuan Chen)
- ed563b3: add test.py (Zhiyuan Chen)
- 1afcf45: simplify to_dict (Zhiyuan Chen)
- 8e4c061: reorganise code (Zhiyuan Chen)
- 87a9585: fix to_dict does not traverse through dict container (Zhiyuan Chen)
- 7ca8564: make apply traverse all data container in NestedDict (Zhiyuan Chen)
- d6aceb7: rewrite apply and apply_ for better extensibility (Zhiyuan Chen)

Commits
- 5102f8b: improve FlatDict.to for user defined tensor type (Zhiyuan Chen)
- f102f7d: fix nesteddict in list does not get converted in .dict (Zhiyuan Chen)

Commits
- 955bcf7: warn default value in add_argument (Zhiyuan Chen)
- 4ff346a: add add_argument in README (Zhiyuan Chen)
- 4b6f338: no type when dest is defined (Zhiyuan Chen)
- 620d76b: remove default_mapping (Zhiyuan Chen)
- 3793803: update doc format (Zhiyuan Chen)
- cc6a458: improve alias (Zhiyuan Chen)
- 3c56a27: fix lints (Zhiyuan Chen)
- 5d82988: improve merge and rename intersection to intersect (Zhiyuan Chen)

Commits
- 7426b3f: Remove all alias for inheritence (Zhiyuan Chen)
- c1bd800: improve deepcopy (Zhiyuan Chen)
- 1f06f6f: support dropnull (Zhiyuan Chen)
- d9d7ef1: improve add_argument (Zhiyuan Chen)