Converts generic string-map types to Dict typing in utils

[bigtimebuddy]

We have a utility for representing simple generic string-key objects called Dict, it was used in some places and not others, this harmonizes it across the code base.

{[name: string]: number}

Becomes

Dict<number>

[codecov-commenter]

Codecov Report

Merging #6699 into dev will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               dev     #6699   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           15        15           
  Lines          671       671           
=========================================
  Hits           671       671           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update bb48487...d16ef18. Read the comment docs.