Implement `db.getSync()` (#21) · Level/memory-level@b5f5c52

Original file line number	Diff line number	Diff line change
`@@ -37,6 +37,7 @@ class MemoryLevel extends AbstractLevel {`
`37`	`37`	`createIfMissing: false,`
`38`	`38`	`errorIfExists: false,`
`39`	`39`	`has: true,`
	`40`	`+getSync: true,`
`40`	`41`	`encodings: { [storeEncoding]: true },`
`41`	`42`	`signals: {`
`42`	`43`	`// Would have no value here because the operations are synchronous`
`@@ -62,6 +63,11 @@ class MemoryLevel extends AbstractLevel {`
`62`	`63`	`return tree.get(key)`
`63`	`64`	`}`
`64`	`65`
	`66`	`+_getSync (key, options) {`
	`67`	`+const tree = options.snapshot?.[kTree] ?? this.#tree`
	`68`	`+return tree.get(key)`
	`69`	`+}`
	`70`	`+`
`65`	`71`	`async _getMany (keys, options) {`
`66`	`72`	`const tree = options.snapshot?.[kTree] ?? this.#tree`
`67`	`73`	`return keys.map(get, tree)`