Improve base migration template

[vjik]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.09%. Comparing base (e2f248d) to head (4c3950c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #292   +/-   ##
=========================================
  Coverage     96.09%   96.09%           
  Complexity      314      314           
=========================================
  Files            21       21           
  Lines          1050     1050           
=========================================
  Hits           1009     1009           
  Misses           41       41           

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