Update eslint and other devDependencies (#391)

* Update eslint and other devDependencies

* Lint JS in examples/ using eslint-plugin-html (#392)

examples/resources/i18n/en.json

@@ -1,3 +1,3 @@
 {
-"uls-example-title": "Universal Language Selector"
+	"uls-example-title": "Universal Language Selector"
 }

examples/resources/i18n/ml.json

@@ -1,3 +1,3 @@
 {
-"uls-example-title": "ആഗോള ഭാഷാ സഹായി"
+	"uls-example-title": "ആഗോള ഭാഷാ സഹായി"
 }