feat: add compatible bundle option

closes #318

Author: sxzz

src/options/index.ts

@@ -206,8 +206,14 @@ async function resolveConfig(
     external,
     noExternal,
     exports = false,
+    bundle,
+    unbundle = typeof bundle === 'boolean' ? !bundle : false,
   } = userConfig
 
+  if (typeof bundle === 'boolean') {
+    logger.warn('`bundle` option is deprecated. Use `unbundle` instead.')
+  }
+
   outDir = path.resolve(cwd, outDir)
   clean = resolveClean(clean, outDir, cwd)
 
@@ -303,6 +309,7 @@ async function resolveConfig(
     external,
     noExternal,
     exports,
+    unbundle,
   }
 
   return config

src/options/types.ts

@@ -172,6 +172,12 @@ export interface Options {
    */
   unbundle?: boolean
 
+  /**
+   * @deprecated Use `unbundle` instead.
+   * @default true
+   */
+  bundle?: boolean
+
   define?: Record<string, string>
   /** @default false */
   shims?: boolean
@@ -387,7 +393,7 @@ export type ResolvedOptions = Omit<
       | 'copy'
       | 'loader'
       | 'name'
-      | 'unbundle'
+      | 'bundle'
     >,
     {
       format: NormalizedFormat[]