Update to Kotlin 1.5.0

Signed-off-by: Ryan Nett <[email protected]>

Author: rnett

Diff for: tensorflow-kotlin-parent/pom.xml

@@ -46,7 +46,7 @@
   </dependencies>
 
   <properties>
-    <kotlin.version>1.4.32</kotlin.version>
+    <kotlin.version>1.5.0</kotlin.version>
     <kotlin.jvmTarget>1.8</kotlin.jvmTarget>
   </properties>