feat(release): replace semantic-release dep with Travis build stages

This makes CI quicker, and releases more stable.

Connects pelias/api#1187

.travis.yml

@@ -8,13 +8,15 @@ node_js:
   - 10
 matrix:
   fast_finish: true
-script: npm test
+script: npm run travis
 before_install:
   - npm i -g npm
-before_script:
-  - npm prune
-after_success:
-  - npx semantic-release
 branches:
   except:
     - /^v\d+\.\d+\.\d+$/
+jobs:
+  include:
+    - stage: release
+      node_js: 10
+      script: curl "https://raw.githubusercontent.com/pelias/ci-tools/master/semantic-release.sh" | bash -
+      if: branch = production

package.json

@@ -28,8 +28,7 @@
     "through2": "^2.0.3"
   },
   "devDependencies": {
-    "precommit-hook": "^3.0.0",
-    "semantic-release": "^15.1.4"
+    "precommit-hook": "^3.0.0"
   },
   "repository": {
     "type": "git",