added SPDX copyright

[maurafortino]

What's included:

• Use SPDX for copyright and reuse. #296

[codecov]

Codecov Report

Merging #298 (e9895a0) into main (1317243) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #298   +/-   ##
=======================================
  Coverage   21.64%   21.64%           
=======================================
  Files           7        7           
  Lines         707      707           
=======================================
  Hits          153      153           
  Misses        552      552           
  Partials        2        2           

Flag	Coverage Δ
unittests	21.64% <ø> (ø)

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

Files Changed	Coverage Δ
WRPAccessControl.go	100.00% <ø> (ø)
WRPHandler.go	83.67% <ø> (ø)
basculeLogging.go	26.47% <ø> (ø)
basculeValidators.go	100.00% <ø> (ø)
main.go	0.00% <ø> (ø)
metrics.go	0.00% <ø> (ø)
primaryHandler.go	0.00% <ø> (ø)