feat: support esm and cjs both

[fengmk2]

BREAKING CHANGE: Drop Node.js < 16 support

closes #22

[socket-security]

New and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
tshy-after	1.0.0	None	+0	5.02 kB	fengmk2
@eggjs/tsconfig	1.3.3	None	+0	4.23 kB	fengmk2
git-contributor	2.1.5	network, shell, environment	+37	6.08 MB	xudafeng
@types/mocha	10.0.3	None	+0	95.4 kB	types
egg-bin	6.5.2	eval, environment	+220	18.4 MB	fengmk2
@types/node	20.8.9	None	+1	3.99 MB	types
iconv-lite	0.6.3	None	+0	349 kB	ashtuchkin
eslint-config-egg	13.0.0	filesystem, shell	+199	27.4 MB	fengmk2
tshy	1.7.0	filesystem, shell	+38	4.12 MB	isaacs

🚮 Removed packages: autod@3.1.2, blanket@1.2.3, contributors@0.5.1, istanbul@0.3.22, jshint@2.13.6, mocha@3.5.3, should@7.1.1

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