We use the current Lua v5.3 on CI

Author: vzamanillo

.circleci/config.yml

@@ -16,7 +16,7 @@ defaults: &defaults
         command: |
           sudo apt-get update && \
           sudo apt-get install --assume-yes --quiet --no-install-suggests \
-            --no-install-recommends lua5.1 luajit
+            --no-install-recommends lua5.3 luajit
     - run:
         name: Luac version
         command: luac -v

.travis.yml

@@ -16,7 +16,7 @@ env:
 
 before_install:
   - sudo apt-get update
-  - sudo apt-get install --assume-yes --quiet --no-install-suggests --no-install-recommends lua5.1 luajit
+  - sudo apt-get install --assume-yes --quiet --no-install-suggests --no-install-recommends lua5.3 luajit
 
 before_script:
   - luac -v