chg: Initial work on deprecation

[Rafiot]

Very much not finished.

[coveralls]

Coverage decreased (-3.9%) to 47.666% when pulling c9d58da on deprecate into 9d73a1e on master.

[codecov]

Codecov Report

Merging #417 into master will decrease coverage by 0.04%.
The diff coverage is 18.14%.

@@            Coverage Diff             @@
##           master     #417      +/-   ##
==========================================
- Coverage   51.61%   51.57%   -0.05%     
==========================================
  Files          35       35              
  Lines        6481     5507     -974     
==========================================
- Hits         3345     2840     -505     
+ Misses       3136     2667     -469

Impacted Files	Coverage Δ
tests/testlive_comprehensive.py	0% <0%> (ø)	⬆️
pymisp/api.py	84.61% <100%> (+42.62%)	⬆️
pymisp/aping.py	14.6% <17.26%> (+3.76%)	⬆️
pymisp/abstract.py	82.51% <42.85%> (ø)	⬆️
pymisp/mispevent.py	70.81% <50.84%> (-2.27%)	⬇️
pymisp/__init__.py	81.08% <83.33%> (+1.08%)	⬆️

---

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[codecov]

Codecov Report

Merging #417 into master will decrease coverage by 3.42%.
The diff coverage is 13.96%.

@@            Coverage Diff             @@
##           master     #417      +/-   ##
==========================================
- Coverage   51.61%   48.18%   -3.43%     
==========================================
  Files          35       35              
  Lines        6481     5966     -515     
==========================================
- Hits         3345     2875     -470     
+ Misses       3136     3091      -45

Impacted Files	Coverage Δ
tests/testlive_comprehensive.py	0% <0%> (ø)	⬆️
pymisp/api.py	84.21% <100%> (+42.22%)	⬆️
pymisp/aping.py	13.35% <14.42%> (+2.51%)	⬆️
pymisp/abstract.py	82.51% <33.33%> (ø)	⬆️
pymisp/mispevent.py	69.89% <47.61%> (-3.18%)	⬇️
pymisp/__init__.py	81.08% <83.33%> (+1.08%)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9d73a1e...c9d58da. Read the comment docs.