`storage.keys()` on `prefixStorage` always returns global keys

[mattmess1221]

Environment

N/a

Reproduction

N/a

Describe the bug

When using a prefixStorage object, the aliases (keys, get, set, etc) just keys still point to the original storage object.

unstorage/src/storage.ts

Lines 474 to 481 in 1e3082d

	// Aliases
	keys: (base, opts = {}) => storage.getKeys(base, opts),
	get: (key: string, opts = {}) => storage.getItem(key, opts),
	set: (key: string, value: T, opts = {}) =>
	storage.setItem(key, value, opts),
	has: (key: string, opts = {}) => storage.hasItem(key, opts),
	del: (key: string, opts = {}) => storage.removeItem(key, opts),
	remove: (key: string, opts = {}) => storage.removeItem(key, opts),

prefixStorage copies the object, but doesn't replace these alias functions.

Additional context

No response

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