Update Kotlin to 1.9 and quiet various irrelevant warnings

Author: pimterry

app/src/main/java/tech/httptoolkit/pinning_demo/MainActivity.kt

@@ -20,6 +20,7 @@ import com.appmattus.certificatetransparency.certificateTransparencyInterceptor
 import com.appmattus.certificatetransparency.certificateTransparencyTrustManager
 import com.appmattus.certificatetransparency.installCertificateTransparencyProvider
 import com.datatheorem.android.trustkit.TrustKit
+import kotlinx.coroutines.DelicateCoroutinesApi
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
@@ -41,6 +42,8 @@ import javax.net.ssl.*
 
 const val LETS_ENCRYPT_ROOT_SHA256 = "C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M="
 
+@Suppress("UNUSED_PARAMETER")
+@DelicateCoroutinesApi
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)

build.gradle

@@ -1,6 +1,6 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = '1.8.22'
+    ext.kotlin_version = '1.9.10'
     repositories {
         google()
         jcenter()