fix maven issues (#390)

Author: VladislavFitz

examples/wearos/build.gradle

@@ -22,6 +22,14 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8
+    }
 }
 
 dependencies {

instantsearch-utils/src/commonJvm/kotlin/com/algolia/instantsearch/util/uuid.kt

@@ -0,0 +1,8 @@
+package com.algolia.instantsearch.util
+
+import java.util.*
+
+public actual fun randomUuid(): String {
+    return UUID.randomUUID().toString()
+}
+

instantsearch-utils/src/commonMain/kotlin/com/algolia/instantsearch/util/uuid.kt

@@ -0,0 +1,3 @@
+package com.algolia.instantsearch.util
+
+public expect fun randomUuid(): String

instantsearch/src/commonMain/kotlin/com/algolia/instantsearch/searcher/hits/HitsSearcher.kt

@@ -9,6 +9,7 @@ import com.algolia.instantsearch.searcher.hits.internal.DefaultHitsSearcher
 import com.algolia.instantsearch.searcher.internal.defaultDispatcher
 import com.algolia.instantsearch.searcher.multi.MultiSearcher
 import com.algolia.instantsearch.searcher.multi.internal.asMultiSearchComponent
+import com.algolia.instantsearch.util.randomUuid
 import com.algolia.search.client.ClientInsights
 import com.algolia.search.client.ClientSearch
 import com.algolia.search.model.APIKey
@@ -17,7 +18,6 @@ import com.algolia.search.model.IndexName
 import com.algolia.search.model.insights.UserToken
 import com.algolia.search.model.search.Query
 import com.algolia.search.transport.RequestOptions
-import java.util.UUID
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
 
@@ -168,5 +168,5 @@ public fun MultiSearcher.addHitsSearcher(
 }
 
 private fun UserToken.Companion.anonymous(): UserToken {
-    return UserToken("anonymous-${UUID.randomUUID()}")
+    return UserToken("anonymous-${randomUuid()}")
 }