feat(logger): new method: program.getLogger()

add program.getLogger() to get the logger instance

fixes #205

src/program/index.ts

@@ -15,7 +15,7 @@ import { createConfigurator } from "../config"
 import { fatalError, UnknownOrUnspecifiedCommandError } from "../error"
 import { customizeHelp } from "../help"
 import { CustomizedHelpOpts } from "../help/types"
-import { logger, setLogger } from "../logger"
+import { getLogger, logger, setLogger } from "../logger"
 import {
   addGlobalOption,
   createOption,
@@ -308,6 +308,13 @@ export class Program extends EventEmitter {
     return this
   }
 
+  /**
+   * Get the configured logger instance
+   */
+  getLogger(): Logger {
+    return getLogger()
+  }
+
   /**
    * Disable a global option. Will warn if the global option
    * does not exist of has already been disabled.