build esm files to separate folder

package.json

@@ -4,9 +4,9 @@
   "description": "Super-fast alternative to Babel for when you can target modern JS runtimes",
   "author": "Alan Pierce <alangpierce@gmail.com>",
   "license": "MIT",
-  "main": "dist/index",
-  "module": "dist/index.mjs",
-  "types": "dist/index.d.ts",
+  "main": "dist/index.js",
+  "module": "dist/esm/index.js",
+  "types": "dist/types/index.d.ts",
   "bin": {
     "sucrase": "./bin/sucrase",
     "sucrase-node": "./bin/sucrase-node"

script/build.ts

@@ -53,19 +53,15 @@ async function buildSucrase(): Promise<void> {
     // code again. The second and third outputs should be exactly identical; otherwise we may have a
     // problem where it miscompiled itself.
     await run(`${SUCRASE_SELF} ./src -d ./dist-self-build --transforms imports,typescript -q`);
-    await run(
-      `${SUCRASE_SELF} ./src -d ./dist-self-build --transforms typescript --out-extension mjs -q`,
-    );
+    await run(`${SUCRASE_SELF} ./src -d ./dist-self-build/esm --transforms typescript -q`);
     await run("rm -rf ./dist");
     await run("mv ./dist-self-build ./dist");
     await run(`${SUCRASE_SELF} ./src -d ./dist-self-build --transforms imports,typescript -q`);
-    await run(
-      `${SUCRASE_SELF} ./src -d ./dist-self-build --transforms typescript --out-extension mjs -q`,
-    );
+    await run(`${SUCRASE_SELF} ./src -d ./dist-self-build/esm --transforms typescript -q`);
     await run("diff -r ./dist ./dist-self-build");
     // Also add in .d.ts files from tsc, which only need to be compiled once.
     await run(`${TSC} --project ./src --outDir ./dist-types`);
-    await mergeDirectoryContents("./dist-types/src", "./dist");
+    await mergeDirectoryContents("./dist-types/src", "./dist/types");
     // Link all integrations to Sucrase so that all building/linting/testing is up to date.
     await run("yarn link");
   }

src/index.ts

@@ -30,8 +30,7 @@ export type SourceMapOptions = import("./Options").SourceMapOptions;
 export type Transform = import("./Options").Transform;
 
 export function getVersion(): string {
-  // eslint-disable-next-line
-  return require("../package.json").version;
+  return "3.20.3";
 }
 
 export function transform(code: string, options: Options): TransformResult {