chore(deps): add bunyan as first-class dep

package.json

@@ -49,8 +49,7 @@
  "consumer driven testing"
  ],
  "author": "Matt Fellows <[email protected]> (http://twitter.com/matthewfellows)",
- "contributors": [
- {
+ "contributors": [{
  "name": "Tarcio Saraiva",
  "email": "[email protected]",
  "url": "http://twitter.com/tarciosaraiva"
@@ -85,6 +84,7 @@
  "@pact-foundation/pact-node": "^6.14.2",
  "@types/express": "^4.11.1",
  "body-parser": "^1.18.2",
+ "bunyan": "^1.8.12",
  "cli-color": "^1.1.0",
  "es6-object-assign": "^1.1.0",
  "es6-promise": "^4.1.1",
@@ -101,6 +101,7 @@
  "@pact-foundation/karma-pact": "~2.1.5",
  "@types/bluebird": "^3.5.20",
  "@types/bunyan": "^1.8.3",
+ "bunyan-prettystream": "^0.1.3",
  "@types/chai": "^4.0.3",
  "@types/chai-as-promised": "0.0.31",
  "@types/cli-color": "^0.3.29",