Updated esbuild patch for Jasmine 4.3 to use let instead of var (because that is what Jasmine's code now uses).

Changes

Due to the [way we setup Jasmine tests](https://makandracards.com/makandra/75556-adding-jasmine-javascript-specs-to-a-webpack-er-project) in our projects, you may run into various errors when Jasmine boots.
# Setting `jasmineRequire` on undefined
Jasmine 4 may fail with an error like this:
```text
Uncaught TypeError: Cannot set properties of undefined (setting 'jasmineRequire')
```
This is due to issues in Jasmine's [environment detection](https://github.com/jasmine/jasmine/blob/502cb24bb89212917a3c943b593fd918ffc481cb/lib/jasmine-core/jasmine.js#L28-L47). It must be fixed by patching the Jasmine sources.
## Fix for Webpacker
Add the package `string-replace-loader` to your `package.json`. If you're on Webpacker 5 (Webpack 4) the latest version you can use is `2.x`.
Now add the following loader to your `config/webpack/environment.js`:
```js
environment.loaders.prepend('fix-jasmine4-global-detection', {
  test: /jasmine-core\/lib\/jasmine-core\/jasmine\.js$/,
  use: [{
    loader: 'string-replace-loader',
    options: {
      search: 'window.toString() === \'[object GjsGlobal]\'',
      replace: 'window.toString() === \'[object Window]\''
    }
  }]
})
```
## Fix for ESBuild / jsbundling-rails
Add the package `esbuild-plugin-text-replace` to your `package.json`.
Now add the following plugin to your `esbuild.config.js`:
```js
const textReplace = require('esbuild-plugin-text-replace')
const esbuild = require('esbuild')
esbuild.build({
  ...
  plugins: [
    textReplace({
      include: /jasmine-core\/lib\/jasmine-core\/jasmine\.js$/,
      pattern: [
-        ['var jasmineRequire;', 'var jasmineRequire; const global = window;'],
+        ['let jasmineRequire;', 'let jasmineRequire; const global = window;'],
      ],
    }),
  ],
})
```
+If you are on Jasmine < 4.3.0, use `var` instead of `let` in the code above.
+
# Missing `getJasmineRequireObj()`
If you get this error:
```text
Uncaught ReferenceError: getJasmineRequireObj is not defined
```
then you need a manually expose `getJasmineRequireObj()` to your specs.
## Fix for Webpack
Add a file
```js
// app/webpack/spec/support/jasmine_provider.js
import jasmineRequire from 'jasmine-core/lib/jasmine-core/jasmine.js'
export default function getJasmineRequireObj() {
  return jasmineRequire;
}
```
Then expose the provider in your `config/webpack/environment.js`:
```js
const webpack = require('webpack')
environment.plugins.prepend('Provide', new webpack.ProvidePlugin({
  getJasmineRequireObj: ['spec/support/jasmine_provider.js', 'default'],
}))
```
## Fix for ESBuild / jsbundling-rails
TODO.