Use packaged version of mermaid node module

debian/control

@@ -392,6 +392,7 @@ Depends: ${shlibs:Depends}, ${misc:Depends},
  node-jszip-utils,
  node-lodash (>= 4.17.15~),
  node-marked (>= 0.3~),
+ node-mermaid,
  node-mousetrap,
  node-pdfjs-dist,
 # Include node-pikaday only after @gitlab/ui is accepted

debian/patches/0740-use-packaged-modules.patch

@@ -130,7 +130,7 @@ Use debian packaged node modules when available
      "diff": "^3.4.0",
      "document-register-element": "1.14.3",
      "dompurify": "^2.0.11",
-@@ -85,81 +62,52 @@
+@@ -85,81 +62,51 @@
      "editorconfig": "^0.15.3",
      "emoji-regex": "^7.0.3",
      "emoji-unicode-version": "^0.2.1",
@@ -159,7 +159,7 @@ Use debian packaged node modules when available
 -    "lodash": "^4.17.20",
 +    "loader-utils": "^2.0.0",
      "marked": "^0.3.12",
-     "mermaid": "^8.5.2",
+-    "mermaid": "^8.5.2",
      "mersenne-twister": "1.1.0",
      "minimatch": "^3.0.4",
      "miragejs": "^0.1.40",