Update build, fix warning

Author: garyb

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
-sudo: false
-node_js:
-  - 5
+dist: trusty
+sudo: required
+node_js: 6
 env:
   - PATH=$HOME/purescript:$PATH
 install:
@@ -11,13 +11,11 @@ install:
   - chmod a+x $HOME/purescript
   - npm install -g bower
   - npm install
+  - bower install
 script:
   - npm run build
 after_success:
 - >-
   test $TRAVIS_TAG &&
-  psc-publish > .pursuit.json &&
-  curl -X POST http://pursuit.purescript.org/packages \
-    -d @.pursuit.json \
-    -H 'Accept: application/json' \
-    -H "Authorization: token ${GITHUB_TOKEN}"
+  echo $GITHUB_TOKEN | pulp login &&
+  echo y | pulp publish --no-push

bower.json

@@ -17,6 +17,6 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-prelude": "^1.0.0-rc.1"
+    "purescript-prelude": "^1.0.0-rc.4"
   }
 }

package.json

@@ -1,12 +1,11 @@
 {
   "private": true,
   "scripts": {
-    "postinstall": "pulp dep install",
     "clean": "rimraf output && rimraf .pulp-cache",
     "build": "pulp build"
   },
   "devDependencies": {
-    "pulp": "^8.0.0",
+    "pulp": "^8.2.0",
     "rimraf": "^2.5.0"
   }
 }

src/Control/MonadPlus.purs

@@ -21,7 +21,6 @@ import Control.MonadZero (class MonadZero, guard)
 import Control.Plus (class Plus, empty)
 
 import Data.Functor (class Functor, map, void, ($>), (<#>), (<$), (<$>))
-import Data.Unit (Unit, unit)
 
 -- | The `MonadPlus` type class has no members of its own but extends
 -- | `MonadZero` with an additional law: