🔥 Dropped Node v6 support (#10771)

no issue
    
- Node v6 has come to EOL as of 2019-04-30 (ref. https://github.com/nodejs/Release#end-of-life-releases)
- Removed Node v6 specific tests and code

.travis.yml

@@ -3,7 +3,6 @@ language: node_js
 node_js:
 - '10'
 - '8'
-- '6'
 cache: yarn
 services:
 - mysql

core/server/lib/mobiledoc/converters/index.js

@@ -13,28 +13,15 @@ module.exports = {
         try {
             return require('@tryghost/html-to-mobiledoc').toMobiledoc;
         } catch (err) {
-            if (process.versions.node.startsWith('v6.')) {
-                // NOTE: When Node v6 is dropped this code block should be removed
-                return () => {
-                    throw new common.errors.InternalServerError({
-                        message: 'Unable to convert from source HTML to Mobiledoc',
-                        context: 'The html-to-mobiledoc package was not installed',
-                        help: 'Please upgrade to Node.js v10',
-                        code: 'HTML_TO_MOBILEDOC_INSTALLATION',
-                        err: err
-                    });
-                };
-            } else {
-                return () => {
-                    throw new common.errors.InternalServerError({
-                        message: 'Unable to convert from source HTML to Mobiledoc',
-                        context: 'The html-to-mobiledoc package was not installed',
-                        help: 'Please review any errors from the install process by checking the Ghost logs',
-                        code: 'HTML_TO_MOBILEDOC_INSTALLATION',
-                        err: err
-                    });
-                };
-            }
+            return () => {
+                throw new common.errors.InternalServerError({
+                    message: 'Unable to convert from source HTML to Mobiledoc',
+                    context: 'The html-to-mobiledoc package was not installed',
+                    help: 'Please review any errors from the install process by checking the Ghost logs',
+                    code: 'HTML_TO_MOBILEDOC_INSTALLATION',
+                    err: err
+                });
+            };
         }
     }
 };

core/test/regression/api/v2/admin/posts_spec.js

@@ -173,11 +173,6 @@ describe('Posts API', function () {
         });
 
         it('html to plaintext', function () {
-            // NOTE: only supported in node v8 and higher
-            if (process.version.startsWith('v6.')) {
-                this.skip();
-            }
-
             return request
                 .get(localUtils.API.getApiQuery(`posts/${testUtils.DataGenerator.Content.posts[0].id}/`))
                 .set('Origin', config.get('url'))

core/test/unit/api/v2/utils/serializers/input/posts_spec.js

@@ -371,13 +371,6 @@ describe('Unit: v2/utils/serializers/input/posts', function () {
         });
 
         describe('Ensure html to mobiledoc conversion', function () {
-            before(function () {
-                // NOTE: only supported in node v8 and higher
-                if (process.version.startsWith('v6.')) {
-                    this.skip();
-                }
-            });
-
             it('no transformation when no html source option provided', function () {
                 const apiConfig = {};
                 const mobiledoc = '{"version":"0.3.1","atoms":[],"cards":[],"sections":[]}';

core/test/unit/lib/mobiledoc/converters/converters_spec.js

@@ -1,22 +0,0 @@
-const should = require('should');
-const converters = require('../../../../../server/lib/mobiledoc/converters');
-
-describe('Unit: lib/mobiledoc/converters', function () {
-    describe('htmlToMobiledocConverter should be unsupported in node v6', function () {
-        before(function () {
-            if (!process.version.startsWith('v6.')) {
-                this.skip();
-            }
-        });
-
-        it('should throw when running on node v6', function () {
-            try {
-                const thrower = converters.htmlToMobiledocConverter();
-                thrower();
-                throw new Error('should not execute');
-            } catch (err) {
-                err.message.should.equal('Unable to convert from source HTML to Mobiledoc');
-            }
-        });
-    });
-});

package.json

@@ -35,7 +35,7 @@
     "postinstall": "cpy node_modules/@tryghost/members-theme-bindings/build/members-theme-bindings.js core/server/public/"
   },
   "engines": {
-    "node": "^6.9.0 || ^8.9.0 || ^10.13.0",
+    "node": "^8.9.0 || ^10.13.0",
     "cli": "^1.9.0"
   },
   "dependencies": {