Use explicit purescript version in build

Author: garyb

.travis.yml

@@ -1,14 +1,8 @@
 language: node_js
 dist: trusty
 sudo: required
-node_js: 6
-env:
-  - PATH=$HOME/purescript:$PATH
+node_js: stable
 install:
-  - TAG=$(wget -q -O - https://github.com/purescript/purescript/releases/latest --server-response --max-redirect 0 2>&1 | sed -n -e 's/.*Location:.*tag\///p')
-  - wget -O $HOME/purescript.tar.gz https://github.com/purescript/purescript/releases/download/$TAG/linux64.tar.gz
-  - tar -xvf $HOME/purescript.tar.gz -C $HOME/
-  - chmod a+x $HOME/purescript
   - npm install -g bower
   - npm install
   - bower install

package.json

@@ -5,10 +5,11 @@
     "build": "eslint src && pulp build --censor-lib --strict"
   },
   "devDependencies": {
-    "phantomjs-prebuilt": "^2.1.13",
     "eslint": "^3.8.1",
+    "phantomjs-prebuilt": "^2.1.13",
     "pulp": "^9.0.1",
     "purescript-psa": "^0.3.9",
+    "purescript": "^0.10.6",
     "rimraf": "^2.5.4"
   }
 }