Update swift-argument-parser checkout to 0.3.0

Author: owenv

utils/update_checkout/update-checkout-config.json

@@ -63,7 +63,7 @@
                 "llbuild": "master",
                 "swift-tools-support-core": "master",
                 "swiftpm": "master",
-                "swift-argument-parser": "0.0.6",
+                "swift-argument-parser": "0.3.0",
                 "swift-driver": "master",
                 "swift-syntax": "master",
                 "swift-stress-tester": "master",
@@ -93,7 +93,7 @@
                 "llbuild": "master",
                 "swift-tools-support-core": "master",
                 "swiftpm": "master",
-                "swift-argument-parser": "0.0.6",
+                "swift-argument-parser": "0.3.0",
                 "swift-driver": "master",
                 "swift-syntax": "master",
                 "swift-stress-tester": "master",
@@ -316,7 +316,7 @@
                 "llbuild": "master",
                 "swift-tools-support-core": "master",
                 "swiftpm": "master",
-                "swift-argument-parser": "0.0.6",
+                "swift-argument-parser": "0.3.0",
                 "swift-driver": "master",
                 "swift-syntax": "master",
                 "swift-stress-tester": "master",