Use bitcore-lib as a peerDependency

.travis.yml

@@ -6,6 +6,9 @@ before_install:
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
 install:
+    # Install peerDependencies on > npm3
+    # When all dependencies declare bitcore-lib as a peerDependency this can be bumped up, but this matches the current ecosystem version expected by dependencies
+  - if [ $(npm --version | sed 's/\..*//g') -ge 3 ]; then npm install [email protected]; fi
   - npm install
 after_script:
   - gulp coveralls

package.json

@@ -22,14 +22,15 @@
     "type": "git",
     "url": "https://github.com/bitpay/bitcore-message.git"
   },
-  "dependencies": {
-    "bitcore-lib": "^0.13.7"
-  },
+  "dependencies": {},
   "devDependencies": {
     "bitcore-build": "bitpay/bitcore-build",
     "brfs": "^1.3.0",
     "chai": "~1.10.0",
     "gulp": "^3.8.10"
   },
+  "peerDependencies": {
+    "bitcore-lib": "~0.13.7"
+  },
   "license": "MIT"
 }