Allow using rollup 3.0.0

[dmnsgn]

peerDeps are:

rollup-plugin-web-worker-loader/package.json

Lines 22 to 24 in 48df453

	"peerDependencies": {
	"rollup": "^1.9.2 || ^2.0.0"
	}

so load is not up to date and this can clash and dedupe an already installed rollup 3.

Would you consider adding ^3.0.0 to it?

The only place I see it is used is here and the rollup API seems to be the same between v2 and v3:

rollup-plugin-web-worker-loader/src/plugin/load.js

Lines 82 to 98 in 48df453

	rollup.rollup(inputOptions).then(bundle => {
	state.exclude.delete(id);
	state.exclude.delete(target);
	const bundleOptions = {
	format: 'iife',
	name: 'worker_code',
	sourcemap: true,
	inlineDynamicImports: true,
	};
	bundle.generate(bundleOptions).then(result => {
	resolve(handleBundleGenerated(state, config, addWatchFile, id, workerID, result));
	}).catch(reject);
	}).catch(reason => {
	state.exclude.delete(id);
	state.exclude.delete(target);
	reject(reason);
	});