Call emitWarningIfUnsupportedVersion from getRuntimeConfig (smithy-lang#392)

Author: trivikr

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/runtimeConfig.ts.template

@@ -1,10 +1,12 @@
 import { ${clientConfigName} } from "${clientModuleName}";
 import { getRuntimeConfig as getSharedRuntimeConfig } from "./runtimeConfig.shared";
+import { emitWarningIfUnsupportedVersion } from "@aws-sdk/smithy-client";
 
 /**
  * @internal
  */
 export const getRuntimeConfig = (config: ${clientConfigName} = {}) => {
+  emitWarningIfUnsupportedVersion(process.version);
   const clientSharedValues = getSharedRuntimeConfig(config);
   return {
     ...clientSharedValues,