On Ubuntu and Debian, suggest using lua 5.3 rather than 5.1

lua 5.3 should be available for any recent Ubuntu or Debian.
Reasons for preferring 5.3 over 5.1 include the availability of
UTF8 libraries.  If 5.1 is explicitly installed alongside 5.3 it's
possible to end up with different versions with different shared
library locations, which can confuse.

Author: ajtown

docs/INSTALL.md

@@ -17,7 +17,7 @@ Then:
 
 Start with:
 
-    sudo apt install build-essential libboost-dev libboost-filesystem-dev libboost-program-options-dev libboost-system-dev lua5.1 liblua5.1-0-dev libshp-dev libsqlite3-dev rapidjson-dev
+    sudo apt install build-essential libboost-dev libboost-filesystem-dev libboost-program-options-dev libboost-system-dev lua5.3 liblua5.3-dev libshp-dev libsqlite3-dev rapidjson-dev
 
 Once you've installed those, then `cd` back to your Tilemaker directory and simply: