misc updates

[quantizor]

1. pay attention to SC_VERSION when hashing to provide more effective component isolation when multiple SC instances are running on the page

2. Bundle size improvements

3. Fix keyframes not receiving nested stylis context, and therefore missing plugins if applicable

Fixes #3008 #3076 #2993 #3163
Probably fixes #2074

[kitten]

If we're minifying all output bundles (which I'm a fan of) I'd love to make sure to also try out Closure Compiler, which is pretty amazing

styled-components/packages/styled-components/rollup.config.js

Lines 111 to 137 in d220a20

	const serverConfig = {
	...configBase,
	output: [
	getESM({ file: 'dist/styled-components.esm.js' }),
	getCJS({ file: 'dist/styled-components.cjs.js' }),
	],
	plugins: configBase.plugins.concat(
	replace({
	__SERVER__: JSON.stringify(true),
	}),
	minifierPlugin
	),
	};
	const browserConfig = {
	...configBase,
	output: [
	getESM({ file: 'dist/styled-components.browser.esm.js' }),
	getCJS({ file: 'dist/styled-components.browser.cjs.js' }),
	],
	plugins: configBase.plugins.concat(
	replace({
	__SERVER__: JSON.stringify(false),
	}),
	minifierPlugin
	),
	};

This is what we're currently doing for urql at least, where we try to squeeze out a lot of bytes here and there https://github.com/FormidableLabs/urql/blob/e031f9b887960a8113890777e8a100973068a36c/scripts/rollup/plugins.js#L98-L137

[quantizor]

Shaved off 0.4kB!

[quantizor]

So although it reduced the bundle size, something that terser is doing actually regressed perf here. Going to hold off on it for now.