fix size limit creation

Author: mydea

dev-packages/size-limit-gh-action/index.mjs

@@ -81,10 +81,7 @@ class SizeLimit {
   }
 
   parseResults(output) {
-    // Ignore any output before `[`, as the command itself may be logged...
-    const stripped = output.slice(output.indexOf('[')).trim();
-
-    const results = JSON.parse(stripped);
+    const results = JSON.parse(output);
 
     return results.reduce((current, result) => {
       let time = {};
@@ -154,7 +151,7 @@ class SizeLimit {
 async function execSizeLimit() {
   let output = '';
 
-  const status = await exec('yarn', ['size-limit', '--json'], {
+  const status = await exec('yarn run --silent size-limit --json', {
     windowsVerbatimArguments: false,
     ignoreReturnCode: true,
     cwd: process.cwd(),