Add missing changes of SDK version and build tools

.travis.yml

@@ -23,10 +23,10 @@ android:
     - platform-tools
 
     # The BuildTools version used by your project
-    - build-tools-28.0.3
+    - build-tools-29.0.3
 
     # The SDK version used to compile your project
-    - android-28
+    - android-29
 
 before_cache:
   - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock

tools/release/sign_apk.sh

@@ -17,7 +17,7 @@ PARAM_KEYSTORE_PATH=$1
 PARAM_APK=$2
 
 # Other params
-BUILD_TOOLS_VERSION="28.0.3"
+BUILD_TOOLS_VERSION="29.0.3"
 MIN_SDK_VERSION=19
 
 echo "Signing APK with build-tools version ${BUILD_TOOLS_VERSION} for min SDK version ${MIN_SDK_VERSION}..."