Update package.json

Author: chrisjsewell

package.json

@@ -1,12 +1,17 @@
 {
     "name": "myst-highlight",
     "displayName": "myst-highlight",
-    "description": "A syntax highlighter for the MyST Markdown format",
+    "description": "The official syntax highlighter for the MyST Markdown format",
     "version": "0.0.1",
     "repository": {
         "type": "git",
-        "url": "https://github.com/ExecutableBookProject/myst-highlight.git"
+        "url": "https://github.com/ExecutableBookProject/myst-highlight-grammar.git"
     },
+    "homepage": "https://github.com/ExecutableBookProject/myst-highlight-grammar/blob/master/README.md",
+    "publisher": "ExecutableBookProject",
+    "authors": [
+        "Chris Sewell"
+    ],
     "license": "MIT",
     "engines": {
         "vscode": "^1.43.0"