fix: restore diagnostics with yarn pnp

Synckit was unable to properly load es modules, and would instead hang
when eslint attempted to generate diagnostics. A patch was recently
introduced upstream [1] so we update to bring in the fix.

[1]: un-ts/synckit@4fb10bd

Issue: 775

Author: Wilson Bondanza

package.json

@@ -64,7 +64,7 @@
   },
   "dependencies": {
     "prettier-linter-helpers": "^1.0.1",
-    "synckit": "^0.11.7"
+    "synckit": "^0.11.12"
   },
   "devDependencies": {
     "@1stg/remark-preset": "^3.0.1",