Update Gradle and tools (#300)

* Update gradle and tools

* Bump bintray-release version for compatibility with Gradle 5

* Update Travis build tools

* Remove findbugs completely

* Remove pmd completely

.travis.yml

@@ -13,7 +13,7 @@ android:
   - tools
   - tools
   - platform-tools
-  - build-tools-27.0.3
+  - build-tools-28.0.3
   - android-28
   - extra
   - addon

build.gradle

@@ -1,12 +1,12 @@
 buildscript {
-  ext.kotlin_version = '1.2.50'
+  ext.kotlin_version = '1.3.31'
   repositories {
     google()
     jcenter()
   }
   dependencies {
-    classpath 'com.android.tools.build:gradle:3.1.3'
-    classpath 'com.novoda:bintray-release:0.8.1'
+    classpath 'com.android.tools.build:gradle:3.4.1'
+    classpath 'com.novoda:bintray-release:0.9.1'
     classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
   }
 }

config/android-quality.gradle

@@ -1,18 +1,7 @@
-apply plugin: 'pmd'
-apply plugin: 'findbugs'
 apply plugin: 'checkstyle'
 
 def isTravis = "true".equals(System.getenv("TRAVIS"))
 
-pmd {
-  ruleSetFiles = files("${project.rootDir}/config/pmd/pmd-ruleset.xml")
-}
-
-findbugs {
-  includeFilter = file("${project.rootDir}/config/findbugs/findbugs-config.xml")
-  excludeFilter = file("${project.rootDir}/config/findbugs/findbugs-excludes.xml")
-}
-
 checkstyle {
   toolVersion = "7.1.1"
   showViolations isTravis
@@ -25,37 +14,6 @@ android.lintOptions {
   textOutput 'stdout'
 }
 
-task pmd(type: Pmd) {
-  description 'Run pmd'
-  group 'verification'
-
-  source = fileTree('src/main/java')
-  consoleOutput = isTravis
-  ignoreFailures = false
-
-  reports {
-    xml.enabled = false
-    html.enabled = !isTravis
-  }
-}
-
-task findbugs(type: FindBugs, dependsOn: assemble) {
-  description 'Run findbugs'
-  group 'verification'
-
-  classes = fileTree('build/intermediates/classes/')
-  source = fileTree('src/main/java/')
-  classpath = files()
-  includeFilter = file("$rootProject.projectDir/config/findbugs/findbugs-config.xml")
-  excludeFilter = file("$rootProject.projectDir/config/findbugs/findbugs-excludes.xml")
-  ignoreFailures = false
-
-  reports {
-    xml.enabled = false
-    html.enabled = true
-  }
-}
-
 task checkstyle(type: Checkstyle) {
   description 'Run checkstyle'
   group 'verification'
@@ -68,7 +26,7 @@ task checkstyle(type: Checkstyle) {
   classpath = files()
 }
 
-check.dependsOn 'checkstyle', 'findbugs', 'pmd', 'lint'
+check.dependsOn 'checkstyle', 'lint'
 
 apply plugin: 'jacoco'