Fix Git hooks

Author: gaearon

.husky/pre-commit

@@ -1,5 +1,4 @@
 #!/bin/sh
 . "$(dirname "$0")/_/husky.sh"
 
-cd beta
 yarn lint-staged

package.json

@@ -18,7 +18,7 @@
     "ci-check": "npm-run-all prettier:diff --parallel lint tsc lint-heading-ids",
     "tsc": "tsc --noEmit",
     "start": "next start",
-    "postinstall": "patch-package && (is-ci || (cd .. && husky install .husky))",
+    "postinstall": "patch-package && (is-ci || husky install .husky)",
     "check-all": "npm-run-all prettier lint:fix tsc"
   },
   "dependencies": {