Delete pip that is larger than 50M

Author: bact

appveyor.yml

@@ -136,7 +136,7 @@ on_success:
   # Note: Cygwin is not available on Visual Studio 2019, can try Msys2.
   - "ECHO Remove old or huge cache"
   - C:\cygwin\bin\find "%LOCALAPPDATA%/pip" -type f -mtime +360 -delete
-  - C:\cygwin\bin\find "%LOCALAPPDATA%/pip" -type f -size +100M -delete
+  - C:\cygwin\bin\find "%LOCALAPPDATA%/pip" -type f -size +50M -delete
   - C:\cygwin\bin\find "%LOCALAPPDATA%/pip" -empty -delete
   # Show size of cache
   - C:\cygwin\bin\du -hs "%LOCALAPPDATA%/pip/Cache"