Merge branch 'kneither' into 'master'

remove keythereum dependency

See merge request caelum-tech/caelum-identity!16

package.json

 {
   "name": "@caelum-tech/identity",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "Caelum Identity library",
   "main": "index.js",
   "scripts": {
@@ -27,10 +27,7 @@
     "url": "https://gitlab.com/caelum-tech/caelum-identity/issues"
   },
   "homepage": "https://gitlab.com/caelum-tech/caelum-identity#readme",
-  "dependencies": {
-    "ethers": "^4.0.27",
-    "keythereum": "^1.0.4"
-  },
+  "dependencies": {},
   "devDependencies": {
     "chai": "^4.2.0",
     "chai-as-promised": "^7.1.1",
@@ -42,6 +39,7 @@
     "eslint-plugin-node": "^9.0.1",
     "eslint-plugin-promise": "^4.1.1",
     "eslint-plugin-standard": "^4.0.0",
+    "ethers": "^4.0.27",
     "fs-extra": "^8.0.1",
     "openzeppelin-solidity": "^2.3.0",
     "mocha": "^6.1.4",