Workaround nyc@15

Co-authored-by: raphinesse

Author: fisker

appveyor.yml

@@ -8,7 +8,7 @@ environment:
   # - nodejs_version: "4"
 
 matrix:
-  fast_finish: true
+  fast_finish: false
 
   # allow_failures:
   #   - nodejs_version: "4" # for eslint 5
@@ -27,7 +27,7 @@ install:
       if ($env:nodejs_version -eq "4") {
         npm install -g npm@3;
       }
-      if ($env:nodejs_version -eq "12") {
+      if ($env:nodejs_version -eq "12" -or $env:nodejs_version -eq "10") {
         npm install -g [email protected];
       }
   - npm install