[Tests] up to node v7.0, v6.9, v5.12, v4.6, io.js v3.3; improve test matrix

Author: ljharb

.travis.yml

@@ -1,5 +1,37 @@
 language: node_js
 node_js:
+  - "7.0"
+  - "6.9"
+  - "6.8"
+  - "6.7"
+  - "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"
+  - "4.6"
+  - "4.5"
+  - "4.4"
+  - "4.3"
+  - "4.2"
+  - "4.1"
+  - "4.0"
+  - "iojs-v3.3"
   - "iojs-v3.2"
   - "iojs-v3.1"
   - "iojs-v3.0"
@@ -26,11 +58,47 @@ node_js:
   - "0.6"
   - "0.4"
 before_install:
-  - '[ "${TRAVIS_NODE_VERSION}" = "0.6" ] || npm install -g [email protected] && npm install -g npm'
+  - 'if [ "${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" ] && [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then npm install -g npm; fi'
+script:
+  - 'if [ -n "${LINT-}" ]; then npm run lint ; fi'
+  - 'if [ -n "${COVERAGE-}" ]; then npm run coverage ; fi'
+  - 'if [ -n "${TEST-}" ]; then npm run tests-only ; fi'
 sudo: false
+env:
+  - TEST=true
 matrix:
   fast_finish: true
+  include:
   allow_failures:
+    - node_js: "6.8"
+    - node_js: "6.7"
+    - node_js: "6.6"
+    - 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: "4.5"
+    - node_js: "4.4"
+    - node_js: "4.3"
+    - node_js: "4.2"
+    - node_js: "4.1"
+    - node_js: "4.0"
+    - node_js: "iojs-v3.2"
     - node_js: "iojs-v3.1"
     - node_js: "iojs-v3.0"
     - node_js: "iojs-v2.4"

package.json

@@ -7,7 +7,8 @@
     "tape": "^4.5.1"
   },
   "scripts": {
-    "test": "tape test/*.js"
+    "test": "npm run tests-only",
+    "tests-only": "tape test/*.js"
   },
   "testling": {
     "files": [