Update version to 0.0.16, add Appender and AppenderFactory classes, refactor LoggerFactory methods, and implement logging functionality with tests.

src/index.ts

@@ -1,8 +1,9 @@
 import type ILogger from './ILogger';
 import type IAppender from './appenders/IAppender';
+import AppenderFactory from './appenders/AppenderFactory';
 import LoggerFactory from './LoggerFactory';
 import LoggingLevelMapping from './level/LoggingLevelMapping';
 
 export type {ILogger, IAppender};
-export {LoggerFactory, LoggingLevelMapping};
-export default {LoggerFactory, LoggingLevelMapping};
+export {AppenderFactory, LoggerFactory, LoggingLevelMapping};
+export default {AppenderFactory, LoggerFactory, LoggingLevelMapping};