Added type hints into utils.py

[quarckster]

No description provided.

[codecov]

Codecov Report

Merging #203 (22107ef) into master (ca9d3b2) will decrease coverage by 0.40%.
The diff coverage is 96.51%.

❗ Current head 22107ef differs from pull request most recent head e650027. Consider uploading reports for the commit e650027 to get more accurate results

@@            Coverage Diff             @@
##           master     #203      +/-   ##
==========================================
- Coverage   86.62%   86.22%   -0.41%     
==========================================
  Files          18       18              
  Lines        2550     2504      -46     
==========================================
- Hits         2209     2159      -50     
- Misses        341      345       +4     

Flag	Coverage Δ
unittests	86.22% <96.51%> (-0.41%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/widgetastic/utils.py	84.74% <96.51%> (+0.08%)	⬆️
src/widgetastic/widget/image.py	66.66% <0.00%> (-8.34%)	⬇️
src/widgetastic/ouia/input.py	35.71% <0.00%> (-4.29%)	⬇️
src/widgetastic/ouia/checkbox.py	37.50% <0.00%> (-3.68%)	⬇️
src/widgetastic/browser.py	75.47% <0.00%> (-0.48%)	⬇️
src/widgetastic/widget/select.py	91.66% <0.00%> (-0.37%)	⬇️
src/widgetastic/widget/checkbox.py	94.11% <0.00%> (-0.33%)	⬇️
src/widgetastic/widget/base.py	92.52% <0.00%> (-0.32%)	⬇️
src/widgetastic/widget/table.py	89.03% <0.00%> (-0.31%)	⬇️
src/widgetastic/widget/input.py	96.49% <0.00%> (-0.18%)	⬇️
... and 3 more

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