fix: move @oclif/errors from devDependencies to dependencies

[merceyz]

What's the problem this PR addresses?

@oclif/parser uses @oclif/errors at runtime but doesn't declare it as a dependency, this causes Yarn in PnP mode to reject access to the package. When using node_modules this causes @oclif/parser to rely on hoisting which is not guaranteed to place it in a location where we can access it.

How did you fix it?

Moved @oclif/errors from devDependencies to dependencies

[salesforce-cla]

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[codecov]

Codecov Report

Merging #71 into master will decrease coverage by 91.38%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #71       +/-   ##
==========================================
- Coverage   91.38%   0.00%   -91.39%     
==========================================
  Files          11       1       -10     
  Lines         325      29      -296     
  Branches       86      14       -72     
==========================================
- Hits          297       0      -297     
- Misses         12      29       +17     
+ Partials       16       0       -16     

Impacted Files	Coverage Δ
src/validate.ts	0.00% <0.00%> (-96.88%)	⬇️
src/deps.ts
src/parse.ts
src/util.ts
src/screen.ts
src/list.ts
src/errors.ts
src/help.ts
src/args.ts
src/index.ts
... and 1 more

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[RasPhilCo]

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[RasPhilCo]

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