[js][auth] add sendSignInLinkToEmail method

lib/modules/auth/index.js

@@ -391,6 +391,21 @@ export default class Auth extends ModuleBase {
     );
   }
 
+  /**
+   * Sends a sign-in email link to the user with the specified email
+   * @param {string} email The email account to sign in with.
+   * @param actionCodeSettings
+   */
+  sendSignInLinkToEmail(
+    email: string,
+    actionCodeSettings?: ActionCodeSettings
+  ): Promise<void> {
+    return getNativeModule(this).sendSignInLinkToEmail(
+      email,
+      actionCodeSettings
+    );
+  }
+
   /**
    * Completes the password reset process, given a confirmation code and new password.
    *