Fixed rule finder

Old code was failed to find function after code compiled and obfuscated. That because of code was trying to access function by its name "dynamically". But compiling removes function names and code occurs error.

src/plugin.ts

@@ -63,10 +63,10 @@ export function alertPlugin (md: MarkdownIt): void {
   md.renderer.rules.blockquote_close = renderBlockquoteClose
 
   // Find actual blockquote function
-  const actualBlockquote = md.block.ruler
-    .getRules('')
-    .find((val: RuleBlock) => val.name === 'blockquote')
-  if (actualBlockquote === undefined) throw new Error('Blockquote rule not found!')
+  const ruler = (md.block.ruler as any)
+  const rule = ruler.__rules__.find((rule: any) => rule.name === 'blockquote')
+  const actualBlockquote = rule.fn as RuleBlock
+  if (typeof actualBlockquote !== 'function') throw new Error('Blockquote rule not found!')
 
   // Change it with the custom one
   md.block.ruler.at(

tsconfig.json

@@ -17,6 +17,7 @@
     },
     "include": [
         "src/**/*.ts",
+        "typings/**/*.d.ts"
     ],
     "exclude": [
         "node_modules",