Integration fixes

[shmax]

I spent the evening trying to integrate the 2.0 stuff into my private project, and wound up having to fix several little issues that didn't come up before:

• fixed several typos
• handle the case that client doesn't supply a logger
• fixed docs for Model::find
• greatly simplified the dynamic return extension stuff (before, it only detected array type if the one-and-only argument was a ConstArrayType, now it only decides an array if trinary YES and anything else (NO or MAYBE ) is interpreted to be a single.
• removed the dependency on bccomp, and added PHPStan ignore statement for the weird out-of-range int checking trick.

I still have at least one issue around bccomp to sort out, but otherwise everything was pretty simple and took only a few hours to port over (with much of that time consumed by the fixes I had to do in this library).

[codecov]

Codecov Report

Merging #101 (8df044d) into master (43b8d09) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master     #101   +/-   ##
=========================================
  Coverage     98.81%   98.81%           
- Complexity      953      955    +2     
=========================================
  Files            34       34           
  Lines          2362     2365    +3     
=========================================
+ Hits           2334     2337    +3     
  Misses           28       28           

Files Changed	Coverage Δ
lib/Column.php	100.00% <100.00%> (ø)
lib/Config.php	100.00% <100.00%> (ø)
lib/Connection.php	97.07% <100.00%> (ø)
lib/Model.php	99.76% <100.00%> (ø)
lib/Relation.php	100.00% <100.00%> (ø)

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