remove verbal expressions

packages/extension-heading/index.ts

@@ -1,6 +1,4 @@
-import { Node, CommandSpec } from '@tiptap/core'
-import { NodeSpec } from 'prosemirror-model'
-import VerEx from 'verbal-expressions'
+import { Node } from '@tiptap/core'
 import { textblockTypeInputRule } from 'prosemirror-inputrules'
 
 type Level = 1 | 2 | 3 | 4 | 5 | 6
@@ -45,14 +43,7 @@ export default new Node<HeadingOptions>()
   }))
   .inputRules(({ options, type }) => {
     return options.levels.map((level: Level) => {
-      const regex = VerEx()
-        .startOfLine()
-        .find('#')
-        .repeatPrevious(level)
-        .whitespace()
-        .endOfLine()
-
-      return textblockTypeInputRule(regex, type, { level })
+      return textblockTypeInputRule(new RegExp(`^(?:#){${level}}\s$/gm`), type, { level })
     })
   })
   .create()