fix

appveyor.yml

@@ -12,7 +12,7 @@ install:
   - move libevent-2.0.22-stable event
   - xcopy /E event\WIN32-Code event\include
   
-  - bash -c "curl --retry 5 --connect-timeout 30 --location --remote-header-name --remote-name https://www.lua.org/ftp/lua-5.2.4.tar.gz ; exit 0"
+  - bash -c "curl --retry 5 --connect-timeout 30 --location --remote-header-name --remote-name https://www.lua.org/ftp/lua-5.3.4.tar.gz ; exit 0"
   - tar xf lua-5.3.4.tar.gz
   - move lua-5.3.4\src lua