🏷️ Add types for core-js-compat as upstream is missing them currently

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

Author: susnux

src/core-js-compat.d.ts

@@ -0,0 +1,85 @@
+type ModuleName = string;
+
+type Target =
+  | 'android'
+  | 'bun'
+  | 'chrome'
+  | 'chrome-android'
+  | 'deno'
+  | 'edge'
+  | 'electron'
+  | 'firefox'
+  | 'firefox-android'
+  | 'hermes'
+  | 'ie'
+  | 'ios'
+  | 'node'
+  | 'opera'
+  | 'opera-android'
+  | 'phantom'
+  | 'quest'
+  | 'react-native'
+  | 'rhino'
+  | 'safari'
+  | 'samsung';
+
+type TargetVersion = string;
+
+type StringOrRegExp = string | RegExp;
+
+type Modules = StringOrRegExp | readonly StringOrRegExp[];
+
+type BrowserslistQuery = string | ReadonlyArray<string>;
+
+type Environments = {
+  [target in Target]?: string | number;
+};
+
+type Targets = Environments & {
+  browsers?: Environments | BrowserslistQuery,
+  esmodules?: boolean,
+};
+
+type CompatOptions = {
+  /** entry / module / namespace / an array of them, by default - all `core-js` modules */
+  modules?: Modules,
+  /** a blacklist, entry / module / namespace / an array of them, by default - empty list */
+  exclude?: Modules,
+  /** optional browserslist or core-js-compat format query */
+  targets?: Targets | BrowserslistQuery,
+  /** used `core-js` version, by default the latest */
+  version?: string,
+  /** inverse of the result, shows modules that are NOT required for the target environment */
+  inverse?: boolean,
+  /**
+   * @deprecated use `modules` instead
+   */
+  filter?: Modules
+};
+
+type CompatOutput = {
+  /** array of required modules */
+  list: ModuleName[],
+  /** object with targets for each module */
+  targets: {
+    [module: ModuleName]: {
+      [target in Target]?: TargetVersion
+    }
+  }
+}
+
+declare function compat(options?: CompatOptions): CompatOutput
+
+declare module 'core-js-compat' {
+  const ExportedCompatObject: typeof compat & {
+    compat: typeof compat,
+  
+    /** map of modules by `core-js` entry points */
+    entries: {[entry_point: string]: readonly ModuleName[]},
+  
+    /** Full list of modules */
+    modules: readonly ModuleName[]
+  }
+
+  export = ExportedCompatObject
+}