Add missing Connection.getServiceName type definition (#923)

index.d.ts

@@ -297,7 +297,7 @@ declare module 'snowflake-sdk' {
         browserActionTimeout?: number;
 
         /**
-         * Specifies the lists of hosts that the driver should connect to directly, bypassing the proxy server (e.g. *.amazonaws.com to bypass Amazon S3 access). For multiple hosts, separate the hostnames with a pipe symbol (|). 
+         * Specifies the lists of hosts that the driver should connect to directly, bypassing the proxy server (e.g. *.amazonaws.com to bypass Amazon S3 access). For multiple hosts, separate the hostnames with a pipe symbol (|).
          * You can also use an asterisk as a wild card. For example: noProxy: "*.amazonaws.com|*.my_company.com"
          */
         noProxy?: string;
@@ -474,7 +474,7 @@ declare module 'snowflake-sdk' {
         disableConsoleLogin?: boolean;
 
         /**
-         *  Turn on the validation function which checks whether all the connection configuration from users are valid or not. 
+         *  Turn on the validation function which checks whether all the connection configuration from users are valid or not.
          */
         validateDefaultParameters?: boolean;
 
@@ -570,6 +570,11 @@ declare module 'snowflake-sdk' {
          */
         getResultsFromQueryId(options: StatementOption): Promise<RowStatement | FileAndStageBindStatement>;
 
+        /**
+         * Returns the value of the SERVICE_NAME parameter
+         */
+        getServiceName(): string;
+
         /**
          * Checks whether the given status is currently running.
          */