Import from node:fs/promises

[dnalborczyk]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

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

List any relevant issue numbers:

Description

node v14 added a simpler import path for fs promises: fs/promises

[codecov]

Codecov Report

Merging #4777 (e33ebe5) into master (e026801) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4777   +/-   ##
=======================================
  Coverage   99.03%   99.03%           
=======================================
  Files         217      217           
  Lines        7773     7773           
  Branches     2159     2159           
=======================================
  Hits         7698     7698           
  Misses         24       24           
  Partials       51       51           

Impacted Files	Coverage Δ
cli/run/getConfigPath.ts	88.88% <100.00%> (ø)
cli/run/loadConfigFile.ts	96.61% <100.00%> (ø)
cli/run/watch-cli.ts	86.11% <100.00%> (ø)
src/ModuleLoader.ts	100.00% <100.00%> (ø)
src/rollup/rollup.ts	100.00% <100.00%> (ø)
src/utils/resolveId.ts	93.33% <100.00%> (ø)

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