refactor(ts)!: ship yargs.d.ts (#1671)

BREAKING CHANGE: yargs now ships with its own types

lib/yargs.ts

@@ -1394,10 +1394,12 @@ export function Yargs (processArgs: string | string[] = [], cwd = process.cwd(),
 
 // rebase an absolute path to a relative one with respect to a base directory
 // exported for tests
-export function rebase (base: string, dir: string) {
-  return path.relative(base, dir)
+export interface RebaseFunction {
+  (base: string, dir: string): string
 }
 
+export const rebase: RebaseFunction = (base, dir) => path.relative(base, dir)
+
 /** Instance of the yargs module. */
 export interface YargsInstance {
   $0: string

package.json

@@ -12,6 +12,7 @@
   "files": [
     "index.js",
     "yargs.js",
+    "yargs.d.ts",
     "build",
     "locales",
     "LICENSE"