[Tests] up to node v8; newer npm breaks on older node; fix scripts

.travis.yml

@@ -1,36 +1,20 @@
 language: node_js
+os:
+ - linux
 node_js:
-  - "6.6"
-  - "6.5"
-  - "6.4"
-  - "6.3"
-  - "6.2"
-  - "6.1"
-  - "6.0"
-  - "5.12"
-  - "5.11"
-  - "5.10"
-  - "5.9"
-  - "5.8"
-  - "5.7"
-  - "5.6"
-  - "5.5"
-  - "5.4"
-  - "5.3"
-  - "5.2"
-  - "5.1"
-  - "5.0"
-  - "4.5"
-  - "4.4"
-  - "4.3"
-  - "4.2"
-  - "4.1"
-  - "4.0"
+  - "8"
+  - "7"
+  - "6"
+  - "5"
+  - "4"
 before_install:
-  - 'if [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then case "$(npm --version)" in 1.*) npm install -g [email protected] ;; 2.*) npm install -g npm@2 ;; esac ; fi'
-  - 'if [ "${TRAVIS_NODE_VERSION}" != "0.6" ] && [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then npm install -g npm; fi'
+  - 'if [ "${TRAVIS_NODE_VERSION}" = "0.6" ]; then npm install -g [email protected] ; elif [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then case "$(npm --version)" in 1.*) npm install -g [email protected] ;; 2.*) npm install -g npm@2 ;; esac ; fi'
+  - 'if [ "${TRAVIS_NODE_VERSION}" != "0.6" ] && [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then if [ "${TRAVIS_NODE_VERSION%${TRAVIS_NODE_VERSION#[0-9]}}" = "0" ] || [ "${TRAVIS_NODE_VERSION:0:4}" = "iojs" ]; then npm install -g [email protected] ; else npm install -g npm; fi; fi'
+install:
+  - 'if [ "${TRAVIS_NODE_VERSION}" = "0.6" ]; then nvm install 0.8 && npm install -g [email protected] && npm install -g [email protected] && npm install -g npm@2 && npm install && nvm use "${TRAVIS_NODE_VERSION}"; else npm install; fi;'
 script:
-  - 'if [ -n "${LINT-}" ]; then npm run lint ; fi'
+  - 'if [ -n "${PRETEST-}" ]; then npm run pretest ; fi'
+  - 'if [ -n "${POSTTEST-}" ]; then npm run posttest ; fi'
   - 'if [ -n "${COVERAGE-}" ]; then npm run coverage ; fi'
   - 'if [ -n "${TEST-}" ]; then npm run tests-only ; fi'
 sudo: false
@@ -40,30 +24,9 @@ matrix:
   fast_finish: true
   include:
     - node_js: "node"
-      env: LINT=true
+      env: PRETEST=true
     - node_js: "4"
       env: COVERAGE=true
   allow_failures:
-    - node_js: "6.5"
-    - node_js: "6.4"
-    - node_js: "6.3"
-    - node_js: "6.2"
-    - node_js: "6.1"
-    - node_js: "6.0"
-    - node_js: "5.11"
-    - node_js: "5.10"
-    - node_js: "5.9"
-    - node_js: "5.8"
-    - node_js: "5.7"
-    - node_js: "5.6"
-    - node_js: "5.5"
-    - node_js: "5.4"
-    - node_js: "5.3"
-    - node_js: "5.2"
-    - node_js: "5.1"
-    - node_js: "5.0"
-    - node_js: "4.4"
-    - node_js: "4.3"
-    - node_js: "4.2"
-    - node_js: "4.1"
-    - node_js: "4.0"
+    - os: osx
+    - env: TEST=true ALLOW_FAILURE=true

package.json

@@ -5,11 +5,16 @@
   "main": "lib/index.js",
   "scripts": {
     "prepublish": "npm run build",
-    "build": "rimraf lib && babel src -d lib",
+    "clean": "rimraf lib coverage",
+    "prebuild": "npm run clean",
+    "build": "babel src -d lib",
     "lint": "eslint src test",
-    "test": "npm run lint && npm run build && npm run coverage",
-    "tests-only": "npm run build && npm run test:quick",
+    "pretest": "npm run lint",
+    "test": "npm run coverage",
+    "tests-only": "npm run test:quick",
+    "precoverage": "npm run build",
     "coverage": "babel-node node_modules/.bin/istanbul cover --report=html node_modules/.bin/_mocha -- -R tap test/*-test.js",
+    "pretest:quick": "npm run build",
     "test:quick": "babel-node node_modules/.bin/_mocha -R tap test/*-test.js"
   },
   "repository": {