Add Flow typing for all files in constants/ and utils/

src/utils/get-contact-href.js

@@ -1,4 +1,5 @@
-const getContactHref = (name, contact) => {
+// @flow
+const getContactHref = (name: string, contact: string) => {
   let href;
 
   switch (name) {

src/utils/get-icon.js

@@ -1,6 +1,7 @@
+// @flow
 import { ICONS } from '../constants';
 
-const getIcon = (name) => {
+const getIcon = (name: string) => {
   let icon;
 
   switch (name) {

src/utils/index.js

@@ -1,2 +1,3 @@
+// @flow
 export { default as getIcon } from './get-icon';
 export { default as getContactHref } from './get-contact-href';