v0.8.1: reverted to build tools v3.6 (4.0 causes errors)

android/proguard-rules.pro

@@ -2,10 +2,6 @@
 -keepnames class com.shatteredpixel.** { *; }
 -keepnames class com.watabou.** { *; }
 
-# For some reason optimizing shader classes causes visual errors on AGP 4.0
-# TODO check this every so often, might be a bug that gets resolved
--keep class com.watabou.noosa.NoosaScript* { *; }
-
 # retained to support meaningful stack traces
 # note that the mapping file must be referenced in order to make sense of line numbers
 # mapping file can be found in core/build/outputs/mapping after running a release build

build.gradle

@@ -4,7 +4,9 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.0'
+        //FIXME the version of R8 coming with gradle plugin 4.0.0 causes serious problems
+        //noinspection GradleDependency
+        classpath 'com.android.tools.build:gradle:3.6.3'
     }
 }