Edit filter method added

[jensvog]

Adds edit filter method for updating existing Jira filters

[codecov-commenter]

Codecov Report

Merging #901 (2f79e04) into master (791dc2d) will decrease coverage by 0.04%.
The diff coverage is 9.09%.

@@            Coverage Diff             @@
##           master     #901      +/-   ##
==========================================
- Coverage   36.35%   36.31%   -0.05%     
==========================================
  Files          32       32              
  Lines        6293     6304      +11     
  Branches      968      971       +3     
==========================================
+ Hits         2288     2289       +1     
- Misses       3897     3907      +10     
  Partials      108      108              

Impacted Files	Coverage Δ
atlassian/jira.py	19.19% <9.09%> (-0.08%)	⬇️

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