Add method chaining for columns

[Tigrov]

Preparing to combine Column and ColumnSchema in one class

Related PR

• Add method chaining for columns db-pgsql#349

Q	A
Is bugfix?	❌
New feature?	✔️/❌
Breaks BC?	❌
Fixed issues	#854

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.72%. Comparing base (61c325e) to head (ff9c0f8).

❗ Current head ff9c0f8 differs from pull request most recent head f3d9636

Please upload reports for the commit f3d9636 to get more accurate results.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #852      +/-   ##
============================================
+ Coverage     99.66%   99.72%   +0.06%     
  Complexity     1348     1348              
============================================
  Files            71       71              
  Lines          3306     3322      +16     
============================================
+ Hits           3295     3313      +18     
+ Misses           11        9       -2     

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[vjik]

Need to add info to changelog and upgrade