Some fixes in jacoco config

[pieterbos]

set jacoco to ignore generated antlr-code - quite a lot will never ever be hit and it's not relevant

[codecov]

Codecov Report

Merging #39 into master will increase coverage by 3.41%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master      #39      +/-   ##
============================================
+ Coverage     63.24%   66.66%   +3.41%     
+ Complexity     2315     2034     -281     
============================================
  Files           332      332              
  Lines         12304     7166    -5138     
  Branches       1399      903     -496     
============================================
- Hits           7782     4777    -3005     
+ Misses         3752     1966    -1786     
+ Partials        770      423     -347

Impacted Files	Coverage Δ	Complexity Δ
...ain/java/com/nedap/archie/adlparser/ADLParser.java	60.52% <0%> (+2.02%)	9% <0%> (-281%)	⬇️

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