Install typings for escape-html package (#8098)

package.json

@@ -144,6 +144,7 @@
     "@types/css-font-loading-module": "^0.0.6",
     "@types/diff-match-patch": "^1.0.32",
     "@types/enzyme": "^3.10.9",
+    "@types/escape-html": "^1.0.1",
     "@types/file-saver": "^2.0.3",
     "@types/flux": "^3.1.9",
     "@types/jest": "^26.0.20",

yarn.lock

@@ -1776,6 +1776,11 @@
     "@types/cheerio" "*"
     "@types/react" "*"
 
+"@types/escape-html@^1.0.1":
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/@types/escape-html/-/escape-html-1.0.1.tgz#b19b4646915f0ae2c306bf984dc0a59c5cfc97ba"
+  integrity sha512-4mI1FuUUZiuT95fSVqvZxp/ssQK9zsa86S43h9x3zPOSU9BBJ+BfDkXwuaU7BfsD+e7U0/cUUfJFk3iW2M4okA==
+
 "@types/events@^3.0.0":
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/@types/events/-/events-3.0.0.tgz#2862f3f58a9a7f7c3e78d79f130dd4d71c25c2a7"