fix: use name from package.json when building externals dependencies …

…object

Previously implemented by 6563d0e (v1.2.1) and broken by 2a4e311 (v1.3.0)

scripts/build.js

@@ -94,7 +94,7 @@ if (fs.existsSync(webpackExtPath)) {
 				for (const external of Object.keys(extGroup)) {
 					const extPath = await findUp('package.json', { cwd: require.resolve(external) })
 					const extJson = JSON.parse(await fs.readFile(extPath))
-					packageJson.dependencies[external] = extJson.version
+					packageJson.dependencies[extJson.name] = extJson.version
 				}
 			}
 		}