add typescript definition

index.d.ts

@@ -0,0 +1,45 @@
+/**
+ * log4js typescript definition for version 2.3.4
+ * @name log4js-node
+ * @author xialeistudio<xialeistudio@gmail.com>
+ * @date 2017/9/26
+ * @version 0.0.1
+ */
+export declare function getLogger(category?: string): Logger;
+
+export declare function configure(configuration: Configuration): void;
+
+export declare interface Configuration {
+  appenders: { [index: string]: any };
+  categories: { [index: string]: { appenders: string[], level: string } };
+}
+
+export declare interface Logger {
+  new(dispatch: Function, name: string): Logger;
+
+  level: string;
+
+  log(...args: any[]): void;
+
+  isLevelEnabled(level: string): boolean;
+
+  _log(level: string, data: any): void;
+
+  addContext(key: string, value: any): void;
+
+  removeContext(key: string): void;
+
+  clearContext(): void;
+
+  trace(...args: any[]): void;
+
+  debug(...args: any[]): void;
+
+  info(...args: any[]): void;
+
+  warn(...args: any[]): void;
+
+  error(...args: any[]): void;
+
+  fatal(...args: any[]): void;
+}