install Lua, change buildtype to Release

.gitlab-ci.yml

@@ -2,7 +2,7 @@ stages:
   - build
   
 variables:
-  BUILD_TYPE: "DEV"
+  BUILD_TYPE: "REL"
 
 Windows Installer:
   stage: build

.travis.yml

@@ -8,7 +8,7 @@ service:
   
 env:
   global:
-    - BUILD_TYPE=DEV
+    - BUILD_TYPE=REL
 
 matrix:
   include:

.travis/travis.sh

@@ -3,6 +3,9 @@
 # Install lua
 if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
 	brew install lua
+else
+	apt-get update -qq && \
+	apt-get install -qq lua5.2
 fi
 
 # Check if build is not tagged