Fix package name validation (SchemaStore#5798)

Author: popsiclelmlm

src/schemas/json/package.json

@@ -377,8 +377,7 @@
       "description": "The name of the package.",
       "type": "string",
       "maxLength": 214,
-      "minLength": 1,
-      "pattern": "^(?:(?:@(?:[a-z0-9-*~][a-z0-9-*._~]*)?/[a-z0-9-._~])|[a-z0-9-~])[a-z0-9-._~]*$"
+      "minLength": 1
     },
     "version": {
       "description": "Version must be parsable by node-semver, which is bundled with npm as a dependency.",

src/test/package/issue-5230.json

@@ -0,0 +1,3 @@
+{
+  "name": "@is-(unknown)/is-one"
+}