upgrade codemirror

packages/codemirror-extension/package.json

@@ -45,7 +45,7 @@
     "@jupyterlab/settingregistry": "^3.0.0-alpha.4",
     "@jupyterlab/statusbar": "^3.0.0-alpha.4",
     "@lumino/widgets": "^1.11.1",
-    "codemirror": "~5.53.2"
+    "codemirror": "~5.56.0"
   },
   "devDependencies": {
     "rimraf": "~3.0.0",

packages/codemirror/package.json

@@ -51,7 +51,7 @@
     "@lumino/polling": "^1.1.1",
     "@lumino/signaling": "^1.3.5",
     "@lumino/widgets": "^1.11.1",
-    "codemirror": "~5.53.2",
+    "codemirror": "~5.56.0",
     "react": "~16.9.0"
   },
   "devDependencies": {

packages/documentsearch/package.json

@@ -45,7 +45,7 @@
     "@lumino/polling": "^1.1.1",
     "@lumino/signaling": "^1.3.5",
     "@lumino/widgets": "^1.11.1",
-    "codemirror": "~5.53.2",
+    "codemirror": "~5.56.0",
     "react": "~16.9.0"
   },
   "devDependencies": {

yarn.lock

@@ -6863,6 +6863,11 @@ codemirror@~5.53.2:
   resolved "https://registry.yarnpkg.com/codemirror/-/codemirror-5.53.2.tgz#9799121cf8c50809cca487304e9de3a74d33f428"
   integrity sha512-wvSQKS4E+P8Fxn/AQ+tQtJnF1qH5UOlxtugFLpubEZ5jcdH2iXTVinb+Xc/4QjshuOxRm4fUsU2QPF1JJKiyXA==
 
+codemirror@~5.56.0:
+  version "5.56.0"
+  resolved "https://registry.yarnpkg.com/codemirror/-/codemirror-5.56.0.tgz#675640fcc780105cd22d3faa738b5d7ea6426f61"
+  integrity sha512-MfKVmYgifXjQpLSgpETuih7A7WTTIsxvKfSLGseTY5+qt0E1UD1wblZGM6WLenORo8sgmf+3X+WTe2WF7mufyw==
+
 collect-v8-coverage@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/collect-v8-coverage/-/collect-v8-coverage-1.0.0.tgz#150ee634ac3650b71d9c985eb7f608942334feb1"