Updated gravatar function to supply default image

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/js-utilities",
-	"version": "0.3.6",
+	"version": "0.3.7",
 	"description": "JavaScript Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",

src/misc.ts

@@ -16,11 +16,12 @@ export function formEncode(data: any): string {
  * Get profile image from Gravatar
  *
  * @param {string} email Account email address
+ * @param {string} def Default image, can be a link or '404', see: https://docs.gravatar.com/general/images/
  * @returns {string} Gravatar URL
  */
-export function gravatar(email: string) {
+export function gravatar(email: string, def='md') {
 	if(!email) return '';
-	return `https://www.gravatar.com/avatar/${md5(email)}`;
+	return `https://www.gravatar.com/avatar/${md5(email)}?d=${def}`;
 }
 
 /** Parts of a URL */