fix: Remove more lodash stuff

[jimmywarting]

• noop
• extend
• find
• findIndex
• isNumber

[codecov]

Codecov Report

Merging #1067 (4a74e19) into master (4769839) will increase coverage by 0.06%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master    #1067      +/-   ##
==========================================
+ Coverage   88.43%   88.50%   +0.06%     
==========================================
  Files           4        4              
  Lines         173      174       +1     
  Branches       23       23              
==========================================
+ Hits          153      154       +1     
  Misses          1        1              
  Partials       19       19              

Impacted Files	Coverage Δ
packages/core/index.js	88.57% <66.66%> (+0.10%)	⬆️

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