number.toString() doesnt support a radix argument.

[NiclasTheSquirrel]

Describe the bug
The number.toString() function, should be able to have the argument "radix" when you try this on
the micro:bit makecode website, it will produce this error:
error TS2554: Expected 0 arguments, but got 1.
In actual javascript, you should be able to use this function with an argument.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toString

To Reproduce
Goto the javascript editor on makecode, and try the following:
basic.showString(11.toString(2))

Expected behavior
convert 11 to binary and, show the string "1011" on the screen.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Browser: Chrome
• Version: 77.0.3865.90 64 bit