fix: better compatibility on Node 14

[JounQin]

No description provided.

[changeset-bot]

🦋 Changeset detected

Latest commit: edb2e5a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
synckit	Patch

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[github-actions]

📊 Package size report   4%↑

File	Before	After
lib/index.cjs	7.6 kB	7%↑8.2 kB
lib/index.d.ts	1.2 kB	5%↑1.2 kB
lib/index.js	8.4 kB	6%↑8.9 kB
lib/index.js.map	7.1 kB	8%↑7.6 kB
package.json	4.0 kB	-1.21%↓3.9 kB
Total (Includes all files)	37.7 kB	4%↑39.3 kB
Tarball size	10.6 kB	4%↑11.0 kB

Unchanged files

File	Size
lib/types.d.ts	936 B
lib/types.js	44 B
lib/types.js.map	102 B
LICENSE	1.1 kB
README.md	7.3 kB

_{🤖 This report was automatically generated by pkg-size-action}

[codecov]

Codecov Report

Merging #92 (edb2e5a) into main (784f249) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #92   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines          116       121    +5     
  Branches        52        55    +3     
=========================================
+ Hits           116       121    +5     

Impacted Files	Coverage Δ
src/index.ts	100.00% <100.00%> (ø)

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