add copyright notice

src/_components/shared/StripeElement.vue

@@ -1,3 +1,4 @@
+<!-- Copyright (c) 2020 Bubble, Inc. All rights reserved. For personal (non-commercial) use, see license: https://getbubblenow.com/bubble-license/ -->
 <template>
   <div class="wrapper">
     <div id="card-number" class="form-control mt-3" />

src/_scss/components/_modal.scss

@@ -1,3 +1,4 @@
+// Copyright (c) 2020 Bubble, Inc.  All rights reserved. For personal (non-commercial) use, see license: https://getbubblenow.com/bubble-license/
 .vm--container {
   .vm--overlay {
     background-color: #6f28abcc;