fix(base): rename then to andThen to avoid thenable confusion

BREAKING CHANGE: `then` -> `andThen`

fix #13

Author: skeate

package.json

@@ -71,5 +71,6 @@
 		"commitizen": {
 			"path": "./node_modules/cz-conventional-changelog"
 		}
-	}
+	},
+	"packageManager": "[email protected]+sha512.73a29afa36a0d092ece5271de5177ecbf8318d454ecd701343131b8ebc0c1a91c487da46ab77c8e596d6acf1461e3594ced4becedf8921b074fbd8653ed7051c"
 }