chore: Use Flow 0.64.0

[thymikee]

Summary

Keeping things up to date.

• setInterval/ has now IntervalID type
• adjusted typing around worker usage a bit (cc @mjesun)

Test plan

CI green

[codecov-io]

Codecov Report

Merging #5419 into master will decrease coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #5419      +/-   ##
==========================================
- Coverage   62.24%   62.18%   -0.07%     
==========================================
  Files         205      205              
  Lines        6932     6928       -4     
  Branches        4        3       -1     
==========================================
- Hits         4315     4308       -7     
- Misses       2616     2619       +3     
  Partials        1        1

Impacted Files	Coverage Δ
packages/jest-cli/src/reporters/Status.js	93.84% <ø> (ø)	⬆️
packages/jest-haste-map/src/index.js	96.38% <100%> (-1.12%)	⬇️

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[github-actions]

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