chore(*): Update Node.js from 8 to 12, update some dependencies

Node.js 8 ends its support at the end of 2019. Node 12 will be supported
until April 2022 which is way past AngularJS end of support.

Some dependencies needed to be updated to make them work in Node.js 12.

Author: mgol

.nvmrc

@@ -1 +1 @@
-8
+12

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 sudo: false
 node_js:
-  - '8'
+  - '12'
 
 cache:
   yarn: true
@@ -27,7 +27,7 @@ env:
     - secure: oTBjhnOKhs0qDSKTf7fE4f6DYiNDPycvB7qfSF5QRIbJK/LK/J4UtFwetXuXj79HhUZG9qnoT+5e7lPaiaMlpsIKn9ann7ffqFWN1E8TMtpJF+AGigx3djYElwfgf5nEnFUFhwjFzvbfpZNnxVGgX5YbIZpe/WUbHkP4ffU0Wks=
 
 before_install:
-  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.10.1
+  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.19.1
   - export PATH="$HOME/.yarn/bin:$PATH"
 
 before_script:

package.json

@@ -9,8 +9,8 @@
     "url": "https://github.com/angular/angular.js.git"
   },
   "engines": {
-    "node": ">=8.12.0",
-    "yarn": ">=1.10.1",
+    "node": ">=12.13.0",
+    "yarn": ">=1.19.1",
     "grunt-cli": "^1.2.0"
   },
   "scripts": {

scripts/jenkins/init-node.sh

@@ -8,7 +8,7 @@ nvm install
 
 # clean out and install yarn
 rm -rf ~/.yarn
-curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.10.1
+curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.19.1
 export PATH="$HOME/.yarn/bin:$PATH"
 
 # Ensure that we have the local dependencies installed