ci: add all the versions for browserify

Author: goto-bus-stop

.travis.yml

@@ -1,5 +1,28 @@
 language: node_js
+os: linux
 node_js:
-  - "8"
-  - "10"
+  - "14"
+  - "13"
   - "12"
+  - "11"
+  - "10"
+  - "9"
+  - "8"
+  - "6"
+  - "4"
+  - "iojs"
+  - "0.12"
+  - "0.10"
+  - "0.8"
+  - "0.6"
+before_install:
+  # Old npm certs are untrusted https://github.com/npm/npm/issues/20191
+  - 'if [ "${TRAVIS_NODE_VERSION}" = "0.6" ] || [ "${TRAVIS_NODE_VERSION}" = "0.8" ]; then export NPM_CONFIG_STRICT_SSL=false; fi'
+  - 'nvm install-latest-npm'
+install:
+  - 'if [ "${TRAVIS_NODE_VERSION}" = "0.6" ] || [ "${TRAVIS_NODE_VERSION}" = "0.9" ]; then nvm install --latest-npm 0.8 && npm install && nvm use "${TRAVIS_NODE_VERSION}"; else npm install; fi;'
+sudo: false
+matrix:
+  fast_finish: true
+  allow_failures:
+    - node_js: "0.6"