pkg: release v1.1.0-alpha.1 -- native TypeScript

- the API surface is entirely backward-compatible, hence why this is releasing as SemVer minor

- first official release of the TypeScript rewrite
  - this has been on the `main` branch for a few years (c.f. ecb0374 et al), but had not been released until now
  - as it is natively in TS now, `@types/react-signature-canvas` is no longer necessary
    - please file an issue if there are any problems with the typings! this is released as an `alpha` just in case!
  - as it is natively in TS now, the build process needed quite a lot of updating
    - it's now built with Rollup (as this is a library, not an app) and various plugins (some of which I help maintain, like `rollup-plugin-typescript2`) instead of Webpack v1 from like a ~decade ago (did Rollup even exist back then?)
    - there is now a native ESM build and a UMD build for backward-compatibility
      - _note_: the UMD build may be removed at a later date during a SemVer major update/breaking change
    - please file an issue if there are any problems with the build / distribution! this is released as an `alpha` just in case!

Author: agilgur5

README.md

@@ -8,7 +8,7 @@
 <!-- releases / versioning -->
 [![package-json](https://img.shields.io/github/package-json/v/agilgur5/react-signature-canvas.svg)](https://npmjs.org/package/react-signature-canvas)
 [![releases](https://img.shields.io/github/tag-pre/agilgur5/react-signature-canvas.svg)](https://github.com/agilgur5/react-signature-canvas/releases)
-[![commits](https://img.shields.io/github/commits-since/agilgur5/react-signature-canvas/v1.0.5.svg)](https://github.com/agilgur5/react-signature-canvas/commits/main)
+[![commits](https://img.shields.io/github/commits-since/agilgur5/react-signature-canvas/latest.svg)](https://github.com/agilgur5/react-signature-canvas/commits/main)
 <br><!-- downloads -->
 [![dt](https://img.shields.io/npm/dt/react-signature-canvas.svg)](https://npmjs.org/package/react-signature-canvas)
 [![dy](https://img.shields.io/npm/dy/react-signature-canvas.svg)](https://npmjs.org/package/react-signature-canvas)

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "react-signature-canvas",
-  "version": "1.0.5",
+  "version": "1.1.0-alpha.1",
   "description": "A React wrapper component around signature_pad. 100% test coverage, types, examples, & more. Unopinionated and heavily updated fork of react-signature-pad",
   "source": "src/index.tsx",
   "main": "dist/index.umd.min.js",