update pacman packages before running bundle install

freetds

Author: bvogelzang

appveyor.yml

@@ -20,6 +20,9 @@ install:
   - ruby --version
   - gem --version
 
+  # update all packages on the system
+  - pacman -Syu
+
   # prevent freetds to link to wrong ws2_32 lib on i686-w64-mingw32
   - c:/msys64/usr/bin/rm /usr/lib/w32api/libws2_32.a
   # Set up project prerequisits