build: bump version constants to 20.2.0-next #1723

Job	Run time
build	18s
lint	2m 14s
e2e_windows (windows-2025, 22, npm, 1)	39s
e2e_windows (windows-2025, 22, npm, 4)	39s
e2e_windows (windows-2025, 22, npm, 5)	41s
e2e_windows (windows-2025, 22, npm, 2)	39s
e2e_windows (windows-2025, 22, npm, 3)	33s
e2e_windows (windows-2025, 22, esbuild, 1)	41s
e2e_windows (windows-2025, 22, esbuild, 0)	41s
e2e_windows (windows-2025, 22, esbuild, 2)	41s
e2e_windows (windows-2025, 22, npm, 0)	37s
e2e_windows (windows-2025, 22, esbuild, 3)	33s
e2e_windows (windows-2025, 22, esbuild, 5)	30s
e2e_windows (windows-2025, 22, esbuild, 4)	34s
publish-snapshots	-1s
test	-1s
Browser Compatibility Tests	-1s
e2e-package-managers	0s
e2e	0s
e2e-snapshots	0s
	9m 57s

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