Fixes #4321.

`isLiteralArguments` mistakenly looked at `Literal`s instead of
`IdentifierLiteral`s.

This also gets rid of the ugly `.asKey` hack in nodes.coffee.

Fixes #4320.

Very large decimal number literals, binary number literals and octal
literals are lexed into an INFINITY token (instead of a NUMBER token)
and compiled into `2e308`. That is is supposed to be the case for very
large hexdecimal dumber literals as well, but previously wasn't.

Before:

    $ node -p 'require("./").tokens(`0x${Array(256 + 1).join("f")}`)[0][0]'
    NUMBER

After:

    $ node -p 'require("./").tokens(`0x${Array(256 + 1).join("f")}`)[0][0]'
    INFINITY

This commit also cleans up `numberToken` in lexer.coffee a bit.

`"""` (and `"`) strings are lexed into an array of tokens, consisting of
strings and interpolations. Previously, the minimum indententation
inside `"""` strings was stripped from the beginning of _all_ of those
string tokens. Usually, the indentation is longer than any other
sequence of spaces in a `"""` string, so the problem didn't occur in
most cases. This commit makes sure to only strip indentation after
newlines.

Fixes #4314.

Fix minor typo in changelog for 1.11.0

Fixes #4324.

1.11.1