Install nan

Author: jamesbvaughan

.github/workflows/prebuild.yaml

@@ -48,6 +48,7 @@ jobs:
         run: |
           npm install -g node-gyp
           npm install --ignore-scripts
+          npm install nan
           . prebuild/macOS/preinstall.sh
           cp prebuild/macOS/binding.gyp binding.gyp
           node-gyp rebuild -j 2