Update log4j to 2.17 to address CVE-2021-45105.

[jagveer-loky]

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45105

[willarmiros]

Thanks!

[codecov-commenter]

Codecov Report

Merging #314 (e2fb74f) into master (76c5a20) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #314   +/-   ##
=========================================
  Coverage     58.86%   58.86%           
  Complexity     1206     1206           
=========================================
  Files           131      131           
  Lines          5066     5066           
  Branches        593      593           
=========================================
  Hits           2982     2982           
  Misses         1809     1809           
  Partials        275      275           

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