Allow building on Windows (using Git Bash)

CONTRIBUTING.md

@@ -44,7 +44,8 @@ more concrete suggestions.
 
 ## Getting started
 
-Sucrase uses `yarn` for everything.
+Sucrase uses `yarn` for everything. On Windows, either use `Git Bash` or
+build from Windows Subsystem for Linux (WSL).
 
 ```bash
 git clone git@github.com:alangpierce/sucrase.git

prettier.config.js

@@ -3,4 +3,5 @@ module.exports = {
   parser: "typescript",
   printWidth: 100,
   trailingComma: "all",
+  endOfLine: "auto"
 };

script/run.ts

@@ -11,7 +11,7 @@ import {spawn} from "child_process";
 export default function run(command: string): Promise<void> {
   console.log(`> ${command}`);
   return new Promise((resolve, reject) => {
-    const childProcess = spawn("/bin/bash", ["-c", command], {stdio: "inherit"});
+    const childProcess = spawn("bash", ["-c", command], {stdio: "inherit"});
     childProcess.on("close", (code) => {
       if (code === 0) {
         resolve();