bump to support prebuild output for Node 15

Author: shiftkey

.travis.yml

@@ -4,7 +4,7 @@ dist: trusty
 os:
   - linux
   - osx
-node_js: 14
+node_js: 15
 
 env:
   - CC=clang CXX=clang++ npm_config_clang=1

appveyor.yml

@@ -5,7 +5,7 @@ platform:
   - x64
 
 environment:
-  nodejs_version: "14"
+  nodejs_version: "15"
 
 cache:
   - node_modules
@@ -17,7 +17,7 @@ branches:
 clone_depth: 10
 
 install:
-  - ps: Install-Product node $env:nodejs_version x64
+  - ps: Update-NodeJsInstallation (Get-NodeJsLatestBuild $env:nodejs_version) $env:PLATFORM
   - npm install
 
 build_script:

package.json

@@ -34,7 +34,7 @@
     "lint": "npm run cpplint",
     "cpplint": "node-cpplint --filters legal-copyright,build-include,build-namespaces src/*.cc",
     "test": "npm run lint && npm rebuild && mocha --require babel-core/register spec/",
-    "prebuild-node": "prebuild -t 8.9.0 -t 9.4.0 -t 10.11.0 -t 11.9.0 -t 12.0.0 -t 13.0.0 -t 14.0.0 --strip",
+    "prebuild-node": "prebuild -t 8.9.0 -t 9.4.0 -t 10.11.0 -t 11.9.0 -t 12.0.0 -t 13.0.0 -t 14.0.0 -t 15.0.0 --strip",
     "prebuild-node-ia32": "prebuild -t 8.9.0 -t 9.4.0 -a ia32 --strip",
     "prebuild-electron": "prebuild -t 7.0.0 -t 8.0.0 -t 9.0.0 -t 10.0.0 -r electron --strip",
     "prebuild-electron-arm64": "prebuild -t 7.0.0 -t 8.0.0 -t 9.0.0 -t 10.0.0 -r electron -a arm64 --strip",