test: make tests compatible with hapi 18

Also run test against Hapi 17 and Hapi 18. Closes hapi-swagger#557

.gitignore

@@ -15,7 +15,6 @@ test.tap
 node_modules
 npm-debug.log
 .DS_Store
-.vscode
 .coveralls.yml
 .idea
 

.travis.yml

@@ -2,5 +2,10 @@ language: node_js
 node_js:
   - "8"
   - "10"
-after_success:
+env:
+  - HAPI=hapi@17
+  - HAPI=hapi@18
+before_script:
+  - npm install --save-dev $HAPI
+after_script:
   - "npm run test-cov-coveralls"

.vscode/launch.json

@@ -0,0 +1,24 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "test using lab identifier",
+            "program": "${workspaceFolder}/node_modules/.bin/lab",
+            "args": ["-i", "${input:inputLabTestIdentifier}"],
+            "console": "integratedTerminal",
+            "skipFiles": ["<node_internals>/**/*.js"]
+        }
+    ],
+    "inputs": [
+        {
+            "id": "inputLabTestIdentifier",
+            "type": "promptString",
+            "description": "Which test identifier do you want to run?"
+        }
+    ]
+}