Use colored log output and timestamps in default log handler

[urfeex]

I've had this lying around when implementing things. Maybe that would be useful to have it in the general library.

Without this change:

With this change:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.40%. Comparing base (97ad825) to head (f1cd72d).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #267      +/-   ##
==========================================
- Coverage   73.41%   73.40%   -0.02%     
==========================================
  Files          80       80              
  Lines        3182     3177       -5     
  Branches      398      398              
==========================================
- Hits         2336     2332       -4     
+ Misses        628      626       -2     
- Partials      218      219       +1     

Flag	Coverage Δ
ur20-latest	72.05% <100.00%> (-0.02%)	⬇️
ur5-3.14.3	72.91% <100.00%> (-0.05%)	⬇️
ur5e-5.9.4	72.73% <100.00%> (+0.02%)	⬆️

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[urrsk]

I like the colours, it improves the readability. And I love the timestamp!