Update node to 12.4.0 (microsoft#9424)

For microsoft#8453

Author: DonJayamanne

.nvmrc

@@ -1 +1 @@
-v10.11.0
+v12.4.0

CONTRIBUTING.md

@@ -19,7 +19,7 @@
 
 ### Prerequisites
 
-1. [Node.js](https://nodejs.org/) 10.x
+1. [Node.js](https://nodejs.org/) 12.x
 1. [Python](https://www.python.org/) 2.7 or later
 1. Windows, macOS, or Linux
 1. [Visual Studio Code](https://code.visualstudio.com/)

build/ci/templates/globals.yml

@@ -1,6 +1,6 @@
 variables:
  PythonVersion: '3.7' # Always use latest version.
- NodeVersion: '10.11.0' # Check version of node used in VS Code.
+ NodeVersion: '12.4.0' # Check version of node used in VS Code.
  NpmVersion: '6.13.4'
  MOCHA_FILE: '$(Build.ArtifactStagingDirectory)/test-junit.xml' # All test files will write their JUnit xml output to this file, clobbering the last time it was written.
  MOCHA_REPORTER_JUNIT: true # Use the mocha-multi-reporters and send output to both console (spec) and JUnit (mocha-junit-reporter).

news/3 Code Health/8453.md

@@ -0,0 +1 @@
+Update version of node to `12.4.0`.