Update build tools and remove findbugs

Because the findbugs plugin doesn't work with the new build
tools anymore.

Makefile

@@ -8,16 +8,13 @@ debug:
 lint:
 	./gradlew lintDebug
 
-findbugs:
-	./gradlew findBugs
-
 infer: clean
 	infer -- ./gradlew assembleDebug
 
-release: lint findbugs
+release: lint
 	./gradlew assembleRelease
 
-bundle: lint findbugs
+bundle: lint
 	./gradlew bundleRelease
 
 install:

app/build.gradle

@@ -1,5 +1,4 @@
 apply plugin: 'com.android.application'
-apply plugin: 'findbugs'
 
 android {
 	compileSdkVersion sdk_version
@@ -35,17 +34,3 @@ android {
 		}
 	}
 }
-
-task findbugs(type: FindBugs, dependsOn: 'assembleDebug') {
-	excludeFilter = file('./findbugs-exclude.xml')
-	source = fileTree('src/main/java/')
-	classes = files("${project.rootDir}/app/build/intermediates/javac")
-	classpath = files()
-
-	effort = 'max'
-
-	reports {
-		xml.enabled = false
-		html.enabled = true
-	}
-}

build.gradle

@@ -1,6 +1,6 @@
 buildscript {
-	ext.tools_version = '3.6.3'
-	ext.build_tools_version = '28.0.3'
+	ext.tools_version = '4.0.0'
+	ext.build_tools_version = '29.0.3'
 	ext.sdk_version = 29
 
 	repositories {
@@ -21,9 +21,7 @@ allprojects {
 
 	gradle.projectsEvaluated {
 		tasks.withType(JavaCompile) {
-			options.compilerArgs \
-				<< "-Xlint:unchecked" \
-				<< "-Xlint:deprecation"
+			options.compilerArgs << "-Xlint:unchecked"
 		}
 	}
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Thu Feb 27 16:51:05 CET 2020
+#Sun Jun 07 18:56:15 CEST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip