[C++] Single quotes in numeric literals used with user-defined numerals are parsed incorrectly

[Kaznov]

Issue Type: Bug

If .cpp file contains following code:

 using namespace std::chrono_literals;
 auto t = 10'000ms;

From the second line on, everything after single quote is highlighted as a string literal.

Extension version: 0.18.1
VS Code version: Code 1.26.1 (493869ee8e8a846b0855873886fc79d480d342de, 2018-08-16T18:34:20.517Z)
OS version: Linux x64 4.15.0-33-generic

[bobbrow]

it's the user-defined literal (ms) that's tripping up the colorizer. This is atom/language-c#127

[sean-mcmanus]

Fixed in VS Code Insiders.