Restore non-related changes

appveyor.yml

@@ -8,7 +8,7 @@ environment:
   # - nodejs_version: "4"
 
 matrix:
-  fast_finish: false
+  fast_finish: true
 
   # allow_failures:
   #   - nodejs_version: "4" # for eslint 5
@@ -22,10 +22,14 @@ install:
   # Get the latest stable version of Node.js or io.js
   - ps: Install-Product node $env:nodejs_version
 
-  # Use [email protected] to work-around issues w/ nyc@<15 on Windows
-  - npm install -g [email protected]
-
   # install modules
+  - ps: >-
+      if ($env:nodejs_version -eq "4") {
+        npm install -g npm@3;
+      }
+      if ($env:nodejs_version -eq "12" -or $env:nodejs_version -eq "10") {
+        npm install -g [email protected];
+      }
   - npm install
 
   # fix symlinks