fix(BasicCard): schema validation (#304)

Author: Juli Ovechkina

src/schema/validators/common.ts

@@ -567,7 +567,7 @@ export const MapProps = {
 export const CardBase = {
     border: {
         type: 'string',
-        enum: ['border', 'shadow', 'none'],
+        enum: ['line', 'shadow', 'none'],
     },
 };
 

src/sub-blocks/BasicCard/schema.ts

@@ -9,7 +9,7 @@ const BasicCardContentProps = _.omit(ContentBase, ['size', 'theme']);
 export const BasicCard = {
     'basic-card': {
         additionalProperties: false,
-        required: ['url'],
+        required: [],
         properties: {
             ...BaseProps,
             ...CardBase,