Build

Implement `EventEmitter` compatible with browsers #7803

Job	Run time
Build CJS (18)	3m 38s
Build CJS (16)	3m 21s
Build Types (18)	1m 18s
Lint	4m 27s
Build Types (16)	1m 17s
Build Web	46s
Build ESM (18)	1m 46s
Build ESM (16)	1m 19s
End-to-End ganache:ws (18, electron)	14m 10s
End-to-End ganache:ws (18, chrome)	11m 28s
End-to-End ganache:ws (18, firefox)	1m 23s
End-to-End ganache:ws (16, electron)	16m 3s
Integration IPC (18, geth, ipc)	5m 54s
End-to-End ganache:ws (16, chrome)	15m 39s
Integration IPC (16, geth, ipc)	9m 11s
End-to-End ganache:ws (16, firefox)	1m 36s
Integration (18, geth, http)	3m 55s
Integration (18, geth, ws)	6m 30s
Integration (18, ganache, http)	3m 36s
Unit Tests (18)	3m 47s
Integration (18, ganache, ws)	5m 15s
Build Docs (18)	11m 32s
Unit Tests (16)	3m 33s
Integration (16, geth, http)	4m 43s
Integration (16, geth, ws)	6m 28s
Integration (16, ganache, http)	3m 40s
Integration (16, ganache, ws)	5m 13s
	2h 31m 28s

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