New line additions and deletions params

[alanhamlett]

New optional params:

• --line-additions 123
• --line-deletions 123

Closes #609.

[codecov[bot]]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (7ec63d7) 62.96% compared to head (b7031e7) 62.98%.

@@             Coverage Diff             @@
##           develop    #1023      +/-   ##
===========================================
+ Coverage    62.96%   62.98%   +0.01%     
===========================================
  Files          374      374              
  Lines        15965    15994      +29     
===========================================
+ Hits         10053    10074      +21     
- Misses        5378     5384       +6     
- Partials       534      536       +2     

Flag	Coverage Δ
unittests	62.98% <74.19%> (+0.01%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
cmd/heartbeat/heartbeat.go	76.27% <100.00%> (+0.44%)	:arrow_up:
pkg/heartbeat/heartbeat.go	88.37% <100.00%> (+0.27%)	:arrow_up:
cmd/root.go	0.00% <0.00%> (ø)
cmd/params/params.go	85.56% <73.91%> (-0.40%)	:arrow_down: