Tests/rewrite to snapshots

[zorkow]

Moves all tests that use our custom toXmlMatch method to use Jest's snapshot matching. The only exceptions are the tests in ConfigMacros. I need to think a bit about those.
Other tests that could probably be done with snapshot matching are those using toXmlArrayMatch.
Both are for a follow-up PR.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.49%. Comparing base (5caee44) to head (71f6868).

Additional details and impacted files

@@            Coverage Diff             @@
##           develop    #1442     +/-   ##
==========================================
  Coverage    86.49%   86.49%             
==========================================
  Files          340      340             
  Lines        86044    86044             
  Branches      4833     3190   -1643     
==========================================
  Hits         74425    74425             
- Misses       11595    11619     +24     
+ Partials        24        0     -24     

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