Linting fixes for frontend following eslint package upgrade

frontend/src/Components/Form/CheckInput.js

@@ -59,14 +59,14 @@ class CheckInput extends Component {
         shiftKey
       });
     }
-  }
+  };
 
   //
   // Listeners
 
   setRef = (ref) => {
     this._checkbox = ref;
-  }
+  };
 
   onClick = (event) => {
     if (this.props.isDisabled) {
@@ -78,14 +78,14 @@ class CheckInput extends Component {
 
     event.preventDefault();
     this.toggleChecked(checked, shiftKey);
-  }
+  };
 
   onChange = (event) => {
     const checked = event.target.checked;
     const shiftKey = event.nativeEvent.shiftKey;
 
     this.toggleChecked(checked, shiftKey);
-  }
+  };
 
   //
   // Render