Parse package.json manifest keywords

tests/package/test_manifest.py

@@ -627,6 +627,7 @@ def test_package_json_schema():
 {
     "name": "tool-scons",
     "description": "SCons software construction tool",
+    "keywords": "SCons, build",
     "url": "http://www.scons.org",
     "version": "3.30101.0"
 }
@@ -642,6 +643,7 @@ def test_package_json_schema():
         {
             "name": "tool-scons",
             "description": "SCons software construction tool",
+            "keywords": ["scons", "build"],
             "homepage": "http://www.scons.org",
             "version": "3.30101.0",
         },