fix: map exports to dist folder

[amoshydra]

Summary

Update exports map to refer to files from dist folder

Reference taken for this exports map:

• module: implement the "module-sync" exports condition nodejs/node#54648 (first code snippet)

Related resources:

• chore: build project to emit cjs and esm using rollup  #93 (comment) (thanks @ryzokuken to for pointing this out)
• Recommend node/default conditions instead of require/import as a solution to the dual package hazard nodejs/node#52174 (comment)

Related issue

Resolve #119

Previously, exports reference to the non-transpiled typescript files in src.
This is generally undesirable as consumer may not be using Typescript.

In certain case (i.e. #119 in vite) it causes the bundler to transpile the code instead of using the already transpiled mjs, cjs files.

How is this tested?

Attempted with the reproduce steps from #119.

Manually changing the export map in ./decimal128-tsc-issue/node_modules/decimal128/package.json shows successful build.

(1)

npm create vite@latest decimal128-tsc-issue -- --template react-ts
cd decimal128-tsc-issue
npm install
npm install --save decimal128
echo "import { Decimal128 } from 'decimal128'" > .\src\App.tsx
echo "export default () => new Decimal128(123).toString()" >> .\src\App.tsx

(2)
Apply this change inside ./decimal128-tsc-issue/node_modules/decimal128/package.json

(3)

npm run build

[jessealama]

lgtm, thanks!