chore: deps update (#673)

Author: evilebottnawi

appveyor.yml

@@ -21,12 +21,16 @@ environment:
     - nodejs_version: '11'
       webpack_version: latest
       job_part: test
-    - nodejs_version: '6'
+    - nodejs_version: '8'
       webpack_version: next
-      job_part: next
+      job_part: test
 build: 'off'
 matrix:
   fast_finish: true
+  allow_failures:
+    - nodejs_version: '8'
+      webpack_version: next
+      job_part: test
 install:
   - ps: Install-Product node $env:nodejs_version x64
   - npm i -g npm@latest