Merge pull request #436 from ViniciusSossela/old-sdk-support

Old sdk support

android/build.gradle

@@ -50,8 +50,8 @@ android {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation('com.journeyapps:zxing-android-embedded:4.1.0') { transitive = false }
+    implementation('com.journeyapps:zxing-android-embedded:4.2.0') { transitive = false }
     implementation 'androidx.appcompat:appcompat:1.3.0'
-    implementation 'com.google.zxing:core:3.4.1'
+    implementation 'com.google.zxing:core:3.3.3'
     coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.5'
 }