Adapt functools.singledispatch to `coerce

[geonu]

• Resolve Support registry to coerce #118

[codecov]

Codecov Report

Merging #150 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #150      +/-   ##
==========================================
+ Coverage   96.98%   97.01%   +0.03%     
==========================================
  Files          14       14              
  Lines        1524     1541      +17     
==========================================
+ Hits         1478     1495      +17     
  Misses         46       46

[geonu]

• : Is singledispatch action like issubclass?
• : Function Rename
• : lru_cache

I will retry considering better design. Thx!

[youknowone]

After reviewing your patch, I think creating our own registry is better than signledispatch here.

there is a simple registry code here: https://github.com/youknowone/ring/blob/master/ring/coder.py#L66