Improve types for `TableInterface` and `ColumnInterface`

[codecov[bot]]

Codecov Report

Merging #108 (7c47e90) into 2.x (bc7be20) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##                2.x     #108   +/-   ##
=========================================
  Coverage     94.49%   94.49%           
  Complexity     1648     1648           
=========================================
  Files            96       96           
  Lines          4470     4470           
=========================================
  Hits           4224     4224           
  Misses          246      246           

Impacted Files	Coverage Δ
src/Schema/State.php	98.00% <ø> (ø)

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[roxblnfk]

Thanks