Develop fix for Issue #96

[Krlosromero]

Fixing issues for link_style attrs. Tests pased

= poetry run black --diff --check . All done! ✨ 🍰 ✨ 10 files would be left unchanged. poetry run pytest --cov-report=html --cov=gns3fy tests/

tests/test_drawing_utils.py ..... [ 3%] tests/test_gns3fy.py ........................................................................................................................................ [100%]

---------- coverage: platform darwin, python 3.8.5-final-0 ----------- Coverage HTML written to dir htmlcov

========================== 141 passed in 1.84s ==========================================

[codecov[bot]]

Codecov Report

Merging #97 (583c9aa) into master (d8f8737) will decrease coverage by 1.41%. The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master      #97      +/-   ##
==========================================
- Coverage   98.56%   97.15%   -1.42%     
==========================================
  Files           2        3       +1     
  Lines         695      737      +42     
==========================================
+ Hits          685      716      +31     
- Misses         10       21      +11     

Impacted Files	Coverage Δ
gns3fy/gns3fy.py	97.10% <75.00%> (-1.44%)	:arrow_down:
gns3fy/__init__.py	100.00% <0.00%> (ø)

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[Krlosromero]

Merged on #98