Make dir for babel --out-file

Currently there's unexpected regression after upgrade from babel 6.
On creating file with any depth like dist/index.js the error about
not existing directory is thrown.

In this diff I modified babel-cli to create deep directory for out-file
command.

I also replaced `mkdirp` with more supported `make-dir` package which
also have official promise support.

packages/babel-cli/package.json

@@ -24,7 +24,7 @@
     "fs-readdir-recursive": "^1.1.0",
     "glob": "^7.0.0",
     "lodash": "^4.17.10",
-    "mkdirp": "^0.5.1",
+    "make-dir": "^1.3.0",
     "output-file-sync": "^2.0.0",
     "slash": "^2.0.0",
     "source-map": "^0.5.0"

packages/babel-cli/src/babel/dir.js

@@ -1,6 +1,6 @@
 import defaults from "lodash/defaults";
 import outputFileSync from "output-file-sync";
-import { sync as mkdirpSync } from "mkdirp";
+import { sync as makeDirSync } from "make-dir";
 import slash from "slash";
 import path from "path";
 import fs from "fs";
@@ -116,7 +116,7 @@ export default async function({ cliOptions, babelOptions }) {
       util.deleteDir(cliOptions.outDir);
     }
 
-    mkdirpSync(cliOptions.outDir);
+    makeDirSync(cliOptions.outDir);
 
     let compiledFiles = 0;
     for (const filename of cliOptions.filenames) {

packages/babel-cli/src/babel/file.js

@@ -2,6 +2,7 @@ import convertSourceMap from "convert-source-map";
 import defaults from "lodash/defaults";
 import sourceMap from "source-map";
 import slash from "slash";
+import { sync as makeDirSync } from "make-dir";
 import path from "path";
 import fs from "fs";
 
@@ -78,6 +79,8 @@ export default async function({ cliOptions, babelOptions }) {
     const result = buildResult(fileResults);
 
     if (cliOptions.outFile) {
+      makeDirSync(path.dirname(cliOptions.outFile));
+
       // we've requested for a sourcemap to be written to disk
       if (babelOptions.sourceMaps && babelOptions.sourceMaps !== "inline") {
         const mapLoc = cliOptions.outFile + ".map";

packages/babel-cli/test/fixtures/babel/filename --out-file deep/in-files/script.js

@@ -0,0 +1 @@
+arr.map(x => x * MULTIPLIER);

packages/babel-cli/test/fixtures/babel/filename --out-file deep/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["script.js", "--out-file", "dist/nested/script.js"]
+}