added Linting for TypeScript

.eslintrc

@@ -0,0 +1,17 @@
+{
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "rules": {
+    "@typescript-eslint/no-floating-promises": [
+      "error",
+      {
+        "ignoreVoid": false,
+        "ignoreIIFE": false
+      }
+    ]
+  }
+}