Update to Typescript 3.5 (#327)

package-lock.json

@@ -4734,9 +4734,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "3.4.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.4.5.tgz",
-      "integrity": "sha512-YycBxUb49UUhdNMU5aJ7z5Ej2XGmaIBL0x34vZ82fn3hGvD+bgrMrVDpatgz2f7YxUMJxMkbWxJZeAvDxVe7Vw==",
+      "version": "3.5.1",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.5.1.tgz",
+      "integrity": "sha512-64HkdiRv1yYZsSe4xC1WVgamNigVYjlssIoaH2HcZF0+ijsk5YK2g0G34w9wJkze8+5ow4STd22AynfO6ZYYLw==",
       "dev": true
     },
     "uglify-js": {

package.json

@@ -75,7 +75,7 @@
     "tslint": "5.16.0",
     "tslint-config-prettier": "^1.14.0",
     "typedoc": "0.14.2",
-    "typescript": "3.4.5"
+    "typescript": "3.5.1"
   },
   "dependencies": {
     "@azure/cosmos-sign": "1.0.2",

src/client/Item/ItemDefinition.ts

@@ -7,5 +7,6 @@
  * in {@link ItemBody}
  */
 export interface ItemDefinition {
+  id?: string;
   [key: string]: any;
 }