Bump Kotlin to 1.8.21 and Compose compiler to 1.4.7

Close #396

.idea/kotlinc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="KotlinJpsPluginSettings">
-    <option name="version" value="1.8.20" />
+    <option name="version" value="1.8.21" />
   </component>
 </project>

settings.gradle.kts

@@ -9,7 +9,7 @@ dependencyResolutionManagement {
             version("targetSdk", "33")
         }
         create("libs") {
-            version("kotlin", "1.8.20")
+            version("kotlin", "1.8.21")
             version("kotlinx.coroutines", "1.6.4")
             library("kotlin.stdlib", "org.jetbrains.kotlin", "kotlin-stdlib")
                 .versionRef("kotlin")
@@ -37,7 +37,7 @@ dependencyResolutionManagement {
             library("markdown", "org.jetbrains", "markdown")
                 .version("0.4.1")
 
-            version("androidx.compose.compiler", "1.4.5")
+            version("androidx.compose.compiler", "1.4.7")
             library("androidx.compose.runtime", "androidx.compose.runtime", "runtime")
                 .version("1.5.0-alpha04")
             library("androidx.compose.foundation", "androidx.compose.foundation", "foundation")