target-sdk + dependency update

usbSerialExamples/build.gradle

@@ -3,8 +3,7 @@ plugins {
 }
 
 android {
-    compileSdkVersion 30
-    buildToolsVersion '30.0.3'
+    compileSdkVersion 31
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
@@ -13,7 +12,7 @@ android {
 
     defaultConfig {
         minSdkVersion 17
-        targetSdkVersion 30
+        targetSdkVersion 31
         vectorDrawables.useSupportLibrary = true
 
         testInstrumentationRunner "android.test.InstrumentationTestRunner"
@@ -29,6 +28,6 @@ android {
 
 dependencies {
     implementation project(':usbSerialForAndroid')
-    implementation 'androidx.appcompat:appcompat:1.3.1'
-    implementation 'com.google.android.material:material:1.4.0'
+    implementation 'androidx.appcompat:appcompat:1.4.1'
+    implementation 'com.google.android.material:material:1.5.0'
 }