fix(core): generate es exports dts files correctly

[lihbr]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Versions

• siroc: v0.11.0 (latest)
• node: v14.15.3 && 16.3.0

Reproduction

Steps to reproduce

1. Use this package.json export schema:

{
	"exports": {
		".": {
    		"require": "./dist/index.cjs",
    		"import": "./dist/index.es.js"
    	},
    	"./graphql": {
    		"require": "./dist/graphql/index.cjs",
    		"import": "./dist/graphql/index.es.js"
    	}
	}
}

2. Build with siroc build

What is Expected?

  dist/
  ├── graphql/
  │   ├── index.cjs
  │   ├── index.d.ts
  │   └── index.es.js
  ├── index.cjs
  ├── index.d.ts
  └── index.es.js

What is actually happening?

  dist/
  ├── graphql/
  │   ├── index.cjs
- │   ├── index.es.d.ts
  │   └── index.es.js
  ├── index.cjs
- ├── index.es.d.ts
  └── index.es.js

This prevents TypeScript from picking up definition files correctly, filling the types field on the package.json file only fixes the top-level definition file.

Patch

I extended the RegExp to optionally replace .es suffixes if present, fixing the issue.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• All new and existing tests are passing.

ps: that'd be cool if you can also check #211, it's been a month and with this one those are two quick patches, let me know how I can help if needed :(

cc @pi0, @danielroe, @angeloashmore