Add node 16 compatibility

- Fixes tests
- Removes xmlshim dep from test dependencies
- Fixes if logic in map tests
- Upgrades jest and babel configs for version 27 and 7 respectively.

.github/workflows/tests.yml

@@ -37,7 +37,7 @@ jobs:
       fail-fast: true
       matrix:
         platform: [ 'ubuntu-20.04' ]
-        node-version: [ '14.x' ]
+        node-version: [ '16.x' ]
 
     steps:
     - uses: actions/checkout@v2

babel.config.json

@@ -0,0 +1,7 @@
+{
+    "presets": ["@babel/env", "@babel/react"],
+    "targets": {
+        "node": "current"
+    },
+    "plugins": []
+}

install_test_deps.sh

@@ -31,4 +31,4 @@
 #
 
 npm install
-npm install --no-save canvas@2.6.1 xmlshim
+npm install --no-save canvas

jest.config.js

@@ -0,0 +1,11 @@
+const {defaults} = require('jest-config');
+
+module.exports = {
+    ...defaults,
+    testURL: "http://localhost",
+    transform: {"\\.js$": "babel-jest"},
+    transformIgnorePatterns: ["/node_modules/(?!(ol|ol-mapbox-style|jsts|usng|usng-map-collar)/)"],
+    moduleDirectories: ["./src", "./node_modules"],
+    setupFiles: ["./tests/setup.js"],
+    testEnvironment: "jsdom",
+};