Add basic typing support

[kasium]

• Add myyp and main config
• Add flake8-typing-imports to avoid issues with the typing module
• Add some types to utils.py as a PoC

Signed-off-by: Kai Mueller 15907922+kasium@users.noreply.github.com

Part of #319

[codecov[bot]]

Codecov Report

Merging #326 (4326698) into master (a58d6f6) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #326   +/-   ##
=======================================
  Coverage   95.55%   95.55%           
=======================================
  Files          25       25           
  Lines        2026     2027    +1     
  Branches      274      274           
=======================================
+ Hits         1936     1937    +1     
  Misses         56       56           
  Partials       34       34           

Impacted Files	Coverage Δ
jaeger_client/utils.py	90.32% <100.00%> (+0.15%)	:arrow_up:

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