update support libraries

app/build.gradle

@@ -10,6 +10,10 @@ android {
 
         versionCode 175
         versionName '1.3.1'
+
+        vectorDrawables {
+            useSupportLibrary = true
+        }
     }
 
     buildTypes {
@@ -36,8 +40,6 @@ android {
 
 dependencies {
     implementation 'androidx.core:core:1.2.0'
-    implementation 'androidx.legacy:legacy-support-core-utils:1.0.0'
-    implementation 'androidx.legacy:legacy-support-core-ui:1.0.0'
     implementation 'androidx.media:media:1.1.0'
     implementation 'androidx.fragment:fragment:1.2.4'
     implementation 'androidx.legacy:legacy-support-v13:1.0.0'
@@ -49,7 +51,6 @@ dependencies {
     implementation 'androidx.annotation:annotation:1.1.0'
     implementation 'androidx.percentlayout:percentlayout:1.0.0'
     implementation 'androidx.preference:preference:1.1.1'
-    implementation 'androidx.legacy:legacy-preference-v14:1.0.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 
     implementation 'com.github.kabouzeid:app-theme-helper:1.3.10'
@@ -69,7 +70,6 @@ dependencies {
 
     implementation 'com.squareup.retrofit2:retrofit:2.5.0'
     implementation 'com.squareup.retrofit2:converter-gson:2.5.0'
-    implementation 'com.google.code.gson:gson:2.8.6'
     implementation 'com.google.android.material:material:1.1.0'
 
     implementation 'com.github.bumptech.glide:glide:3.8.0'