Add precommit check (#1080)

Keeps the repo clean, same as several other of our repos

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/components/_ExpressionProperty.tsx

@@ -91,7 +91,7 @@ class ExpressionPropertyInternal extends React.Component<ExpressionPropertyInter
     function getValue(data: any) {
       return stringifyPretty(data, {indent: 2, maxLength: 38})
     }
-    
+
     if (jsonError) {
       foundErrors.push({message: "Invalid JSON"});
     }