strictMath is deprecated

[marioana]

Installed product versions

• Visual Studio Professional 2017 Version 15.9.9
• This extension: 1.12.394

Description

I enabled the strictMath option in compilerconfig.json.defaults
"compilers": {
"less": {
"autoPrefix": "",
"cssComb": "none",
"ieCompat": true,
"strictMath": true,
"strictUnits": false,
"relativeUrls": true,
"rootPath": "",
"sourceMapRoot": "",
"sourceMapBasePath": "",
"sourceMap": false
},
and when building i got this error:
The --strict-math option has been deprecated. Use --math=strict.

Steps to recreate

I updated my project to bootstrap 4.3.1, I use this command:
@import (less) "bootstrap.css";
to import the bootstrap css in my custom css and when I built I got the mentioned error.
Most probably, to recreate the error, it's enough just enabling the option.

Current behavior

The error blocks VS or MSBuild from building.