fix(config): display ini config deprecation warning only when commitizen config is inside

[Lee-W]

#159

[codecov]

Codecov Report

Merging #160 into master will increase coverage by 0.24%.
The diff coverage is 93.44%.

@@            Coverage Diff             @@
##           master     #160      +/-   ##
==========================================
+ Coverage   91.60%   91.84%   +0.24%     
==========================================
  Files          33       33              
  Lines         786      785       -1     
==========================================
+ Hits          720      721       +1     
+ Misses         66       64       -2     

Flag	Coverage Δ
#unittests	91.84% <93.44%> (+0.24%)	⬆️

Impacted Files	Coverage Δ
commitizen/config/__init__.py	81.81% <50.00%> (-0.80%)	⬇️
commitizen/cz/customize/customize.py	84.78% <78.57%> (ø)
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/commands/check.py	100.00% <100.00%> (ø)
commitizen/config/base_config.py	91.66% <100.00%> (ø)
commitizen/config/ini_config.py	89.74% <100.00%> (+5.12%)	⬆️
commitizen/config/toml_config.py	93.10% <100.00%> (ø)
commitizen/cz/__init__.py	100.00% <100.00%> (ø)
commitizen/cz/base.py	100.00% <100.00%> (ø)
...en/cz/conventional_commits/conventional_commits.py	100.00% <100.00%> (ø)
... and 14 more

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[woile]

Cool 👍