0.5.4

• Objects can now use number literals and reserved words as keys.
• Classes can now have computed properties.
• Classes can now use number literals and reserved words as method and property names.
• Accessing an object member with the . operator now allows for reserved words to be used as identifiers.

In short, all of these are now acceptable syntax:

let object = { 100: 'foo', function: 'bar' };

class Foo {
    ['foo']() { }
    100() { }
    undefined() { }
}

console.log(object.function); // bar