core-ts [WIP]

TODO

- [ ] ECMAScript proposals
- [x] Finished proposals
- [x] Array find from last
- [x] Stage 3 proposals
- [x] Array grouping
- [x] Change Array by copy
- [x] Stage 2 proposals
- [x] Iterator helpers
- [x] New Set methods
- [x] Map.prototype.emplace
- [x] Array.fromAsync
- [x] Array.isTemplateObject
- [x] Symbol.{ asyncDispose, dispose } for using statement
- [x] Symbol.metadataKey for decorators metadata proposal
- [ ] Stage 1 proposals
- [ ] Observable
- [ ] New collections methods
- [ ] .of and .from methods on collection constructors
- [ ] compositeKey and compositeSymbol
- [ ] Array filtering
- [ ] Array deduplication
- [ ] Getting last item from Array
- [ ] Number.range
- [ ] Number.fromString
- [ ] Math extensions
- [ ] Math.signbit
- [ ] String.cooked
- [ ] String.prototype.codePoints
- [ ] Symbol.matcher for pattern matching
- [ ] Stage 0 proposals
- [ ] Function.prototype.unThis
- [ ] Function.{ isCallable, isConstructor }
- [ ] URL
- [ ] Pre-stage 0 proposals
- [ ] Reflect metadata