Fix keeping annotation with reduced ylim

[amkorb]

The annotation lines were disappearing if the ylim was manually reduced. #91
The clip_on option was set for loc='outside' but not loc='inside'.

[codecov]

Codecov Report

Merging #116 (81a192d) into dev (9b7f581) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##              dev     #116   +/-   ##
=======================================
  Coverage   97.05%   97.05%           
=======================================
  Files          29       29           
  Lines        1936     1936           
=======================================
  Hits         1879     1879           
  Misses         57       57           

Impacted Files	Coverage Δ
statannotations/Annotator.py	91.48% <100.00%> (ø)

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[trevismd]

Thank you, @Amauryk45 !