Upgraded packages to their latest versions (#18)

* Upgraded packages to their latest versions

* Removed support for node 10 and 12

* Fixed tests for node v12 and v14

.github/workflows/publish-package.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 16
       - run: npm ci
       - run: npm test
       - run: npm run lint
@@ -26,7 +26,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 16
           registry-url: https://registry.npmjs.org/
       - run: npm ci
       - run: npm run build:publish

.github/workflows/run-tests.yml

@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x]
+        node-version: [12, 14, 16]
 
     steps:
       - uses: actions/checkout@v2

.nvmrc

@@ -0,0 +1 @@
+v16