Update packages and replace ava with jest

Author: madyankin

.browserslistrc

@@ -0,0 +1,3 @@
+ie 9
+firefox 4
+safari 8

.eslintrc

@@ -5,9 +5,11 @@
   },
   "env": {
     "node": true,
-    "es6": true
+    "es6": true,
+    "jest/globals": true
   },
   "parser": "babel-eslint",
+  "plugins": ["jest"],
   "rules": {
     "import/no-extraneous-dependencies": 0
   }