Separate tests run on legacy Node.js versions

Primarily because it's getting to be a pain in the backside to always
consider pre Node.js 6 when wanting to use up-to-date dependencies.

.github/workflows/verify.yml

@@ -3,12 +3,12 @@ name: Verify changes
 on: [push, pull_request]
 
 jobs:       
-  build:
+  tests:
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        node-version: [0.10.x, 0.12.x, 4.x, 6.x, 8.x, 10.x, 12.x]
+        node-version: [6.x, 8.x, 10.x, 12.x]
 
     steps:
       - uses: actions/checkout@v1
@@ -20,3 +20,21 @@ jobs:
         run: |
           npm install
           npm test
+
+  tests-on-legacy:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [0.10.x, 0.12.x, 4.x]
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: npm install and test
+        run: |
+          npm install mocha@3 chai@3
+          npm run test-unit

.travis.yml

@@ -1,8 +1,5 @@
 language: node_js
 node_js:
-  - '0.10'
-  - 0.12
-  - 4
   - 6
   - 8
   - 10

package.json

@@ -32,8 +32,9 @@
     "npm": ">=1.4.0"
   },
   "scripts": {
-    "pretest": "eslint mustache.js bin/mustache test/**/*.js",
-    "test": "mocha --reporter spec test/*-test.js",
+    "test": "npm run test-lint && npm run test-unit",
+    "test-lint": "eslint mustache.js bin/mustache test/**/*.js",
+    "test-unit": "mocha --reporter spec test/*-test.js",
     "test-render": "mocha  --reporter spec test/render-test",
     "pre-test-browser": "node test/create-browser-suite.js",
     "test-browser": "npm run pre-test-browser && zuul -- test/context-test.js test/parse-test.js test/scanner-test.js test/render-test-browser.js",