feat: 增加了版本号的导出

Author: cloudcome

src/const.ts

@@ -0,0 +1 @@
+export const version = process.env.PKG_VERSION;

src/index.ts

@@ -1,3 +1,4 @@
+export * from './const';
 export * from './normalize-error';
 export * from './try-sync-flatten';
 export * from './try-callback-flatten';

src/types/env.d.ts

@@ -0,0 +1,9 @@
+declare module 'process' {
+  interface ProcessEnv {
+    // package name
+    PKG_NAME: string;
+
+    // package version
+    PKG_VERSION: string;
+  }
+}