Update dependency typedoc-plugin-markdown to v2.2.8

package.json

@@ -54,7 +54,7 @@
     "prettier": "1.18.2",
     "ts-jest": "24.1.0",
     "typedoc": "0.15.0",
-    "typedoc-plugin-markdown": "2.2.6",
+    "typedoc-plugin-markdown": "2.2.8",
     "typescript": "3.6.3"
   }
 }

yarn.lock

@@ -4727,12 +4727,13 @@ typedoc-default-themes@^0.6.0:
     lunr "^2.3.6"
     underscore "^1.9.1"
 
-[email protected].6:
-  version "2.2.6"
-  resolved "https://registry.yarnpkg.com/typedoc-plugin-markdown/-/typedoc-plugin-markdown-2.2.6.tgz#f958e0fa9f569b604ceb1fbbf8ea33f9f26625fa"
-  integrity sha512-1c6Vml1WIlUclLP/NX0Fq8UnQ9K9mak8o9J5P7g4kx3SzPsC1vY4/1rQPffKo1YYbRwU7qWBiM1J9vSEHoYSRQ==
+[email protected].8:
+  version "2.2.8"
+  resolved "https://registry.yarnpkg.com/typedoc-plugin-markdown/-/typedoc-plugin-markdown-2.2.8.tgz#f833c7204e36c8d2dcd969e26b051890cedbc6b8"
+  integrity sha512-4TAXTFSUb4VSlbE1or9jyauYRGekO62Tc40uTtrVyPKCD57JaLRPN7G6OxuOYT6/Rb3UkqYRn1631x0kVPBviQ==
   dependencies:
     fs-extra "^8.1.0"
+    handlebars "^4.1.2"
 
 [email protected]:
   version "0.15.0"