chore(*): drop support for Node.js 5 and 7 (#169)

Fixes #158

BREAKING CHANGE: Support for Node.js version 5+7 are now dropped

.travis.yml

@@ -21,9 +21,7 @@ before_script:
 node_js:
   - '9'
   - '8'
-  - '7.9.0' # currently 7.10.0 fails. For details see: https://github.com/nodejs/node/pull/12861
   - '6'
-  - '5'
   - '4'
 
 jobs:
@@ -99,24 +97,6 @@ jobs:
       env: TAV=knex,ws,graphql,express-graphql,elasticsearch,hapi,express
       script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
 
-    # Node.js 7.9
-    -
-      node_js: '7.9'
-      env: TAV=generic-pool,mysql,redis,koa-router,handlebars,mongodb-core
-      script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
-    -
-      node_js: '7.9'
-      env: TAV=ioredis,pg
-      script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
-    -
-      node_js: '7.9'
-      env: TAV=bluebird
-      script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
-    -
-      node_js: '7.9'
-      env: TAV=knex,ws,graphql,express-graphql,elasticsearch,hapi,express
-      script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
-
     # Node.js 6
     -
       node_js: '6'
@@ -135,24 +115,6 @@ jobs:
       env: TAV=knex,ws,graphql,express-graphql,elasticsearch,hapi,express
       script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
 
-    # Node.js 5
-    -
-      node_js: '5'
-      env: TAV=generic-pool,mysql,redis,koa-router,handlebars,mongodb-core
-      script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
-    -
-      node_js: '5'
-      env: TAV=ioredis,pg
-      script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
-    -
-      node_js: '5'
-      env: TAV=bluebird
-      script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
-    -
-      node_js: '5'
-      env: TAV=knex,ws,graphql,express-graphql,elasticsearch,hapi,express
-      script: 'if ! [[ $TRAVIS_BRANCH == greenkeeper/* ]]; then tav --quiet; fi'
-
     # Node.js 4
     -
       node_js: '4'

docs/compatibility.asciidoc

@@ -7,17 +7,18 @@ endif::[]
 
 == Compatibility Overview
 
-The Elastic APM Node.js agent is tested against Node.js v4.0.0 and above.
-Previous versions of Node.js are not supported.
+Support for the Elastic APM Node.js agent follows the support schedule of Node.js itself to the end-of-line period of each version after its maintenance term.
+Versions of Node.js past their end-of-life date are not supported.
+
+image::https://raw.githubusercontent.com/nodejs/Release/master/schedule.png[]
 
 Some versions of Node.js contain bugs or issues that limit our ability to instrument them correctly.
 The following versions of Node.js are known to not be fully instrumented:
 
-- v7.10.x - Recommended solution: Upgrade to v8.2.0 or higher to get full support
 - v8.0.x - Recommended solution: Upgrade to v8.2.0 or higher to get full support
 - v8.1.x - Recommended solution: Upgrade to v8.2.0 or higher to get full support
 
-NOTE: Support for Node.js 8.2.0 and above is experimental as it makes use the experimental core API https://nodejs.org/api/async_hooks.html[Async Hooks].
+NOTE: Support for Node.js 8.2.0 and above is experimental as it makes use of the experimental core API https://nodejs.org/api/async_hooks.html[Async Hooks].
 If you experience any issues related to using Async Hooks,
 you can always disable the use of this API by setting the <<async-hooks,`asyncHooks`>> config option to `false`.
 Note however,

package.json

@@ -27,7 +27,7 @@
     "url": "git://github.com/elastic/apm-agent-nodejs.git"
   },
   "engines": {
-    "node": ">=4.0.0"
+    "node": "4 || 6 || >= 8"
   },
   "keywords": [
     "opbeat",

test/.jenkins_nodejs.yml

@@ -1,7 +1,5 @@
 NODEJS_VERSION:
   - "9"
   - "8"
-  - "7.9.0"
   - "6"
-  - "5"
   - "4"

test/.jenkins_tav_nodejs.yml

@@ -1,7 +1,5 @@
 NODEJS_VERSION:
   - "9"
   - "8"
-  - "7.9"
   - "6"
-  - "5"
   - "4"