Remove old versions of node from CI tests, parity with CI runners

Author: implausible

.travis.yml

@@ -4,6 +4,8 @@ env:
   - CXX=g++-4.8
 
 node_js:
+  - 8
+  - 10
   - 12
 
 addons:

appveyor.yml

@@ -1,25 +1,9 @@
-os: Visual Studio 2014 CTP4
+os: Visual Studio 2015
 version: "{build}"
 build: off
 platform: x64
 environment:
   matrix:
-  - nodejs_version: "0.10"
-    nodejs_arch: "x86"
-  - nodejs_version: "0.10"
-    nodejs_arch: "x64"
-  - nodejs_version: "0.12"
-    nodejs_arch: "x86"
-  - nodejs_version: "0.12"
-    nodejs_arch: "x64"
-  - nodejs_version: "2"
-    nodejs_arch: "x86"
-  - nodejs_version: "2"
-    nodejs_arch: "x64"
-  - nodejs_version: "4"
-    nodejs_arch: "x64"
-  - nodejs_version: "6"
-    nodejs_arch: "x64"
   - nodejs_version: "8"
     nodejs_arch: "x64"
   - nodejs_version: "10"
@@ -28,6 +12,6 @@ environment:
     nodejs_arch: "x64"
 install:
   - ps: Install-Product node $env:nodejs_version $env:nodejs_arch
-  - npm install --msvs_version=2013
+  - npm install --msvs_version=2015
 test_script:
   - npm test