Use target=10.2 instead of variant=Old

I think this will be more clear to future devs

.travis.yml

@@ -2,9 +2,10 @@ language: groovy
 cache:
   directories:
   - $HOME/.gradle/caches/
+  - $HOME/.gradle/wrapper/dists/
 script:
-  - ./gradlew check -Pvariant=New
-  - ./gradlew check -Pvariant=Old
+  - ./gradlew check -Ptarget=11.6
+  - ./gradlew check -Ptarget=10.2
 notifications:
   slack:
     secure: TFnMix3WLFecQLMgmSIsUrnZUV7s5U7mJlzkfLrGU02u0uztjLcJr9qekg65I0wFtqGuMGAOfPAZo4hf0l5djzJTSUobLdlTpEunIEWd53IUZlljKCJQsVT8hfJtbjpIXMraLRLyTzDkXcRO3v2xthU30vsSI75sxQYufBx5/sU=

config.groovy

@@ -1,5 +1,5 @@
 environments {
-    New {
+    '11.6' {
         output = 'Scratch'
         playerVersion = '11.6'
         additionalCompilerOptions = [
@@ -7,7 +7,7 @@ environments {
                 "-define+=SCRATCH::allow3d,true",
         ]
     }
-    Old {
+    '10.2' {
         output = 'ScratchFor10.2'
         playerVersion = '10.2'
         additionalCompilerOptions = [

scratch.gradle

@@ -21,14 +21,14 @@ repositories {
 apply plugin: org.gradlefx.plugins.GradleFxPlugin
 
 def commonDir = ext.commonDir
-def variant = hasProperty('variant') ? variant : 'New'
-println "Variant is: $variant"
-def config = new ConfigSlurper(variant).parse(file("${commonDir}/config.groovy").toURL())
+def target = hasProperty('target') ? target : '11.6'
+println "Target is: $target"
+def config = new ConfigSlurper(target).parse(file("${commonDir}/config.groovy").toURL())
 
 type = 'mobile'
 version = '1.0-SNAPSHOT'
 frameworkLinkage = 'none'
-buildDir = "${buildDir}/${variant}" // GradleFX does an out-of-date check on the whole build dir
+buildDir = "${buildDir}/${target}" // GradleFX does an out-of-date check on the whole build dir
 output = config.get('output')
 playerVersion = config.get('playerVersion')