Fix linting

src/components/sprite-selector-item/sprite-selector-item.jsx

@@ -76,9 +76,9 @@ const SpriteSelectorItem = props => (
 SpriteSelectorItem.propTypes = {
     className: PropTypes.string,
     costumeURL: PropTypes.string,
+    details: PropTypes.string,
     name: PropTypes.string.isRequired,
     number: PropTypes.number,
-    details: PropTypes.string,
     onClick: PropTypes.func,
     onDeleteButtonClick: PropTypes.func,
     onDuplicateButtonClick: PropTypes.func,

src/containers/costume-tab.jsx

@@ -161,7 +161,7 @@ class CostumeTab extends React.Component {
     formatCostumeDetails (size) {
         // Round up width and height for scratch-flash compatibility
         // https://github.com/LLK/scratch-flash/blob/9fbac92ef3d09ceca0c0782f8a08deaa79e4df69/src/ui/media/MediaInfo.as#L224-L237
-        return `${Math.ceil(size[0])} x ${Math.ceil(size[1])}`
+        return `${Math.ceil(size[0])} x ${Math.ceil(size[1])}`;
     }
     render () {
         const {
@@ -189,7 +189,7 @@ class CostumeTab extends React.Component {
         const addLibraryFunc = target.isStage ? onNewLibraryBackdropClick : onNewLibraryCostumeClick;
         const addLibraryIcon = target.isStage ? addLibraryBackdropIcon : addLibraryCostumeIcon;
 
-        const costumeData = (target.costumes || []).map((costume) => ({
+        const costumeData = (target.costumes || []).map(costume => ({
             name: costume.name,
             assetId: costume.assetId,
             details: costume.size ? this.formatCostumeDetails(costume.size) : null