Do not test on node@12 anymore (has reached end of life), run tests on node@18, use node@16 for the unit tests

Author: josdejong

.github/workflows/browserstack.yaml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 16.x
       - run: npm ci
       - run: npm run test:browserstack
         env:

.github/workflows/build.yaml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [14.x, 16.x, 18.x]
 
     steps:
       - uses: actions/checkout@v2
@@ -33,7 +33,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 16.x
       - run: npm ci
       - run: npm run lint
         env:
@@ -46,7 +46,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 16.x
       - run: npm ci
       - run: npm run coverage && npx codecov
         env:
@@ -59,7 +59,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 16.x
       - run: npm ci
       - run: npm run build-and-test
         env:

.github/workflows/local-browser.yaml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 16.x
       - run: npm ci
       - run: npm run test:browser
         env:

package.json

@@ -166,7 +166,7 @@
     "mathjs": "./bin/cli.js"
   },
   "engines": {
-    "node": ">= 12"
+    "node": ">= 14"
   },
   "bugs": {
     "url": "https://github.com/josdejong/mathjs/issues"