Update kotlin version

Author: oryan-block

pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
-        <kotlin.version>1.4.21</kotlin.version>
+        <kotlin.version>1.4.30</kotlin.version>
         <kotlin-coroutines.version>1.4.3-native-mt</kotlin-coroutines.version>
         <jackson.version>2.12.3</jackson.version>
         <graphql-java.version>16.2</graphql-java.version>
@@ -51,38 +51,16 @@
             <groupId>org.jetbrains.kotlinx</groupId>
             <artifactId>kotlinx-coroutines-jdk8</artifactId>
             <version>${kotlin-coroutines.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.jetbrains.kotlin</groupId>
-                    <artifactId>kotlin-stdlib</artifactId>
-                </exclusion>
-            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.jetbrains.kotlinx</groupId>
             <artifactId>kotlinx-coroutines-core</artifactId>
             <version>${kotlin-coroutines.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.jetbrains.kotlin</groupId>
-                    <artifactId>kotlin-stdlib</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>org.jetbrains.kotlin</groupId>
-                    <artifactId>kotlin-stdlib-common</artifactId>
-                </exclusion>
-            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.jetbrains.kotlinx</groupId>
             <artifactId>kotlinx-coroutines-reactive</artifactId>
             <version>${kotlin-coroutines.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.jetbrains.kotlin</groupId>
-                    <artifactId>kotlin-stdlib</artifactId>
-                </exclusion>
-            </exclusions>
         </dependency>
         <dependency>
             <groupId>com.graphql-java</groupId>