Update dependencies to latest versions

Author: matsev

package.json

@@ -22,13 +22,13 @@
     "node": ">=6"
   },
   "dependencies": {
-    "rimraf": "^2.6.3"
+    "rimraf": "^3.0.0"
   },
   "devDependencies": {
-    "eslint": "^4.19.1",
-    "eslint-plugin-mocha": "^5.0.0",
+    "eslint": "^6.3.0",
+    "eslint-plugin-mocha": "^6.1.1",
     "istanbul": "^0.4.5",
-    "mocha": "^5.1.1"
+    "mocha": "^6.2.0"
   },
   "main": "lib/tmp.js",
   "files": [