Update Gradle notation for dependencies and plugins

* don't let the build fail on linter issues
* update gradle build tools, slf4j for Android and OSMDroid

app/build.gradle

@@ -1,21 +1,22 @@
-apply plugin: 'com.android.application'
+plugins {
+    id 'com.android.application'
+}
 
 android {
     compileSdkVersion 16
-    buildToolsVersion "22.0.1"
+    buildToolsVersion "27.0.3"
 
     defaultConfig {
         applicationId "me.guillaumin.android.osmtracker"
         minSdkVersion 8
         targetSdkVersion 16
+        multiDexEnabled true
 
         testApplicationId "me.guillaumin.android.osmtracker.test"
         testInstrumentationRunner "android.test.InstrumentationTestRunner"
     }
 
     signingConfigs {
-
-
         // Create a file $HOME/.gradle/gradle.properties
         // containing the values signing.storeFile=..., etc.
         if (project.hasProperty('signing.storeFile')) {
@@ -41,21 +42,25 @@ android {
     }
 
     packagingOptions {
+        exclude 'META-INF/DEPENDENCIES'
         exclude 'META-INF/LICENSE.txt'
         exclude 'META-INF/NOTICE.txt'
     }
-
+    android {
+        lintOptions {
+            abortOnError false
+        }
+    }
 }
 
 dependencies {
-    compile 'org.apache.james:apache-mime4j-core:0.7.2'
-    compile 'org.apache.httpcomponents:httpclient:4.2.1'
-    compile 'org.apache.httpcomponents:httpcore:4.2.1'
-    compile 'org.apache.httpcomponents:httpmime:4.2.1'
-    compile 'org.osmdroid:osmdroid-android:5.5:release@aar'
-    compile 'oauth.signpost:signpost-commonshttp4:1.2.1.2'
-    compile 'oauth.signpost:signpost-core:1.2.1.2'
-    compile 'org.slf4j:slf4j-android:1.6.1-RC1'
+    implementation 'org.apache.james:apache-mime4j-core:0.7.2'
+    implementation 'org.apache.httpcomponents:httpclient:4.2.1'
+    implementation 'org.apache.httpcomponents:httpcore:4.2.1'
+    implementation 'org.apache.httpcomponents:httpmime:4.2.1'
+    implementation 'org.osmdroid:osmdroid-android:5.6.5'
+    implementation 'oauth.signpost:signpost-commonshttp4:1.2.1.2'
+    implementation 'org.slf4j:slf4j-android:1.7.25'
 }
 
 task copyNorwegianValues(type: Copy) {

build.gradle

@@ -1,15 +1,17 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     repositories {
+        google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.2'
+        classpath 'com.android.tools.build:gradle:3.0.1'
     }
 }
 
 allprojects {
     repositories {
+        google()
         jcenter()
     }
 }