fix flag

Author: cometkim

Makefile

@@ -56,7 +56,7 @@ lib:
 	./scripts/prebuilt.js
 
 artifacts: lib
-	./scripts/npmPack.js -updateArtifactList
+	./scripts/npmPack.js --updateArtifactList
 
 # Builds the core playground bundle (without the relevant cmijs files for the runtime)
 playground:

scripts/npmPack.js

@@ -4,7 +4,7 @@
 
 // This performs `yarn pack` and retrieves the list of artifact files from the output.
 //
-// In local dev, invoke it with `-updateArtifactList` to perform a dry run of `yarn pack`
+// In local dev, invoke it with `--updateArtifactList` to perform a dry run of `yarn pack`
 // and recreate `packages/artifacts.txt`.
 //
 // In CI, the scripts is invoked without options. It then performs `yarn pack` for real,