Gradle upgrade

app/build.gradle

@@ -47,7 +47,7 @@ dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.4.31"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation 'com.google.android.material:material:1.3.0'
     implementation 'androidx.cardview:cardview:1.0.0'
     implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.0.0'
@@ -56,7 +56,3 @@ dependencies {
     implementation "androidx.exifinterface:exifinterface:1.3.2"
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.4.1'
 }
-
-repositories {
-    mavenCentral()
-}

build.gradle

@@ -1,10 +1,10 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.4.20'
+    ext.kotlin_version = '1.5.0'
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:4.2.1'
@@ -17,7 +17,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }