use void for options hook instead of undefined

[ycmjason]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other: typing

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

Description

currently we are required to return undefined in the options hook when using TS. this change would allow the options hook to have no return value.

[lukastaegert]

Good point, the intention is actually to allow you not to write a return. I also changed this for the other hooks.

[codecov]

Codecov Report

Merging #4463 (b37bf91) into master (b8315e0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4463   +/-   ##
=======================================
  Coverage   98.77%   98.77%           
=======================================
  Files         205      205           
  Lines        7326     7326           
  Branches     2079     2079           
=======================================
  Hits         7236     7236           
  Misses         33       33           
  Partials       57       57           

Impacted Files	Coverage Δ
src/utils/options/normalizeInputOptions.ts	100.00% <ø> (ø)

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