Upgrade toolchain to api/lv 1.4

compiler/daemon/daemon-client-new/build.gradle.kts

@@ -49,7 +49,7 @@ dependencies {
 
 tasks.withType<org.jetbrains.kotlin.gradle.dsl.KotlinCompile<*>> {
     kotlinOptions {
-        apiVersion = "1.3"
+        apiVersion = "1.4"
         freeCompilerArgs += "-Xsuppress-version-warnings"
     }
 }

compiler/daemon/daemon-client/build.gradle.kts

@@ -40,8 +40,8 @@ dependencies {
 
 tasks.withType<org.jetbrains.kotlin.gradle.dsl.KotlinCompile<*>> {
     kotlinOptions {
-        // This module is being run from within Gradle, older versions of which only have kotlin-stdlib 1.3 in the runtime classpath.
-        apiVersion = "1.3"
+        // This module is being run from within Gradle, older versions of which only have older kotlin-stdlib in the runtime classpath.
+        apiVersion = "1.4"
         freeCompilerArgs += "-Xsuppress-version-warnings"
     }
 }