Bump rxjava from 2.2.12 to 2.2.19

Bumps [rxjava](https://github.com/ReactiveX/RxJava) from 2.2.12 to 2.2.19.
- [Release notes](https://github.com/ReactiveX/RxJava/releases)
- [Changelog](https://github.com/ReactiveX/RxJava/blob/v2.2.19/CHANGES.md)
- [Commits](ReactiveX/RxJava@v2.2.12...v2.2.19)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

app/build.gradle

@@ -46,7 +46,7 @@ dependencies {
     implementation 'org.koin:koin-android-viewmodel:2.0.1'
 
     // RxJava
-    def rxJavaVersion = '2.2.12'
+    def rxJavaVersion = '2.2.19'
     def rxKotlinVersion = '2.4.0'
     implementation "io.reactivex.rxjava2:rxjava:$rxJavaVersion"
     implementation "io.reactivex.rxjava2:rxkotlin:$rxKotlinVersion"

splash/build.gradle

@@ -64,7 +64,7 @@ dependencies {
     implementation("androidx.core:core-ktx:1.2.0")
 
     // rx java/kotlin
-    implementation("io.reactivex.rxjava2:rxjava:2.2.16")
+    implementation("io.reactivex.rxjava2:rxjava:2.2.19")
     implementation("io.reactivex.rxjava2:rxkotlin:2.4.0")
     // extensions to rx java/kotlin
     implementation("com.jakewharton.rxrelay2:rxrelay:2.1.1")