unrelated: move @types/commonmark to devDeps

package.json

@@ -54,7 +54,6 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.12.5",
-    "@types/commonmark": "^0.27.4",
     "await-lock": "^2.1.0",
     "blurhash": "^1.1.3",
     "browser-encrypt-attachment": "^0.3.0",
@@ -125,6 +124,7 @@
     "@peculiar/webcrypto": "^1.1.4",
     "@sinonjs/fake-timers": "^7.0.2",
     "@types/classnames": "^2.2.11",
+    "@types/commonmark": "^0.27.4",
     "@types/counterpart": "^0.18.1",
     "@types/diff-match-patch": "^1.0.32",
     "@types/flux": "^3.1.9",