revert codemirror upgrade

package.json

@@ -22,7 +22,7 @@
     "actionsack": "^0.0.13",
     "axios": "^0.21.0",
     "cm-show-invisibles": "^3.1.0",
-    "codemirror": "^5.58.2",
+    "codemirror": "5.51.0",
     "codemirror-graphql": "^0.12.3",
     "codemirror-mode-elixir": "^1.1.2",
     "codemirror-solidity": "^0.2.3",

yarn.lock

@@ -3502,7 +3502,12 @@ codemirror-solidity@^0.2.3:
   dependencies:
     codemirror "^5.56.0"
 
-codemirror@^5.56.0, codemirror@^5.58.2:
+codemirror@5.51.0:
+  version "5.51.0"
+  resolved "https://registry.yarnpkg.com/codemirror/-/codemirror-5.51.0.tgz#7746caaf5223e68f5c55ea11e2f3cc82a9a3929e"
+  integrity sha512-vyuYYRv3eXL0SCuZA4spRFlKNzQAewHcipRQCOKgRy7VNAvZxTKzbItdbCl4S5AgPZ5g3WkHp+ibWQwv9TLG7Q==
+
+codemirror@^5.56.0:
   version "5.58.2"
   resolved "https://registry.yarnpkg.com/codemirror/-/codemirror-5.58.2.tgz#ed54a1796de1498688bea1cdd4e9eeb187565d1b"
   integrity sha512-K/hOh24cCwRutd1Mk3uLtjWzNISOkm4fvXiMO7LucCrqbh6aJDdtqUziim3MZUI6wOY0rvY1SlL1Ork01uMy6w==