Backport of EE added dependency

package.json

@@ -71,6 +71,7 @@
     "raw-loader": "^0.5.1",
     "sanitize-html": "^1.16.1",
     "select2": "3.5.2-browserify",
+    "sha1": "^1.1.1",
     "sql.js": "^0.4.0",
     "style-loader": "^0.21.0",
     "svg4everybody": "2.1.9",

yarn.lock

@@ -1586,6 +1586,10 @@ chardet@^0.4.0:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.4.2.tgz#b5473b33dc97c424e5d98dc87d55d4d8a29c8bf2"
 
+"charenc@>= 0.0.1":
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/charenc/-/charenc-0.0.2.tgz#c0a1d2f3a7092e03774bfa83f14c0fc5790a8667"
+
 chart.js@1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/chart.js/-/chart.js-1.0.2.tgz#ad57d2229cfd8ccf5955147e8121b4911e69dfe7"
@@ -2086,6 +2090,10 @@ cross-spawn@^6.0.5:
     shebang-command "^1.2.0"
     which "^1.2.9"
 
+"crypt@>= 0.0.1":
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/crypt/-/crypt-0.0.2.tgz#88d7ff7ec0dfb86f713dc87bbb42d044d3e6c41b"
+
 cryptiles@2.x.x:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/cryptiles/-/cryptiles-2.0.5.tgz#3bdfecdc608147c1c67202fa291e7dca59eaa3b8"
@@ -7859,6 +7867,13 @@ sha.js@^2.4.0, sha.js@^2.4.8:
     inherits "^2.0.1"
     safe-buffer "^5.0.1"
 
+sha1@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/sha1/-/sha1-1.1.1.tgz#addaa7a93168f393f19eb2b15091618e2700f848"
+  dependencies:
+    charenc ">= 0.0.1"
+    crypt ">= 0.0.1"
+
 shebang-command@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"