fix(package): update pump to version 3.0.0

Closes #12

Author: greenkeeper[bot]

package.json

@@ -22,7 +22,7 @@
  "dependencies": {
  "concat-stream": "^1.5.1",
  "inherits": "^2.0.1",
- "pump": "^1.0.1",
+ "pump": "^3.0.0",
  "size-limit-stream": "^1.0.0",
  "xtend": "^4.0.1"
  },