fix: CFormRadio: fix props import which were deleting props from source

Author: woothu

src/components/Form/CFormRadio.vue

@@ -1,11 +1,14 @@
 <script>
 import CFormCheckbox from './CFormCheckbox'
-delete CFormCheckbox.props.trueValue
-delete CFormCheckbox.props.falseValue
+//solution made to avoid deleting props from CFormCheckbox
+const props = Object.assign({}, CFormCheckbox.props)
+delete props.trueValue
+delete props.falseValue
 
 export default {
   name: 'CFormRadio',
   extends: CFormCheckbox,
+  props,
   type: 'radio',
   methods: {
     getCheckState () {