Remove Shoop dependency

Author: joshbruce

composer.json

@@ -11,8 +11,7 @@
   ],
   "require": {
     "php": "^7.2",
-    "league/commonmark": "~1.5",
-    "8fold/php-shoop": "~0.5"
+    "league/commonmark": "~1.5"
   },
   "require-dev": {
     "phpunit/phpunit": "~9.1"

src/AbbreviationInlineParser.php

@@ -33,9 +33,9 @@ public function parse(InlineParserContext $inlineContext): bool
             $cursor->restoreState($previousCursor);
             return false;
         }
-
-        list($abbr, $title) = Shoop::string($abbr)->dropFirst(2)->dropLast()
-            ->divide("](", false, 2);
+        $abbr = substr($abbr, 2);
+        $abbr = substr($abbr, 0, -1);
+        list($abbr, $title) = explode("](", $abbr, 2);
         $elem = new Abbreviation($abbr, $title);
 
         $inlineContext->getContainer()->appendChild($elem);