Use build version from package.json; Don't preserve header comment

dist/cuprum.d.ts

@@ -1,5 +1,5 @@
-/**!
- @preserve cuprum 0.1.14
+/**
+ cuprum 0.1.15
  @copyright 2020 Edwin Martin <edwin@bitstorm.org>
  @license MIT
  */
@@ -27,6 +27,7 @@ export declare class Cuprum<T> {
 export declare function fromEvent<K extends keyof WindowEventMap>(element: Window, eventType: K, options?: boolean | AddEventListenerOptions): Cuprum<WindowEventMap[K]>;
 export declare function fromEvent<K extends keyof DocumentEventMap>(element: Document, eventType: K, options?: boolean | AddEventListenerOptions): Cuprum<DocumentEventMap[K]>;
 export declare function fromEvent<K extends keyof HTMLElementEventMap>(element: HTMLElement, eventType: K, options?: boolean | AddEventListenerOptions): Cuprum<HTMLElementEventMap[K]>;
+export declare function fromCustomEvent(element: HTMLElement | Document | Window, eventType: string, options?: boolean | AddEventListenerOptions): Cuprum<unknown>;
 export declare function combine<T>(obs1$: Observable<T>): Observable<[T]>;
 export declare function combine<T, U>(obs1$: Observable<T>, obs2$: Observable<U>): Observable<[T, U]>;
 export declare function combine<T, U, V>(obs1$: Observable<T>, obs2$: Observable<U>, obs3$: Observable<V>): Observable<[T, U, V]>;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "cuprum",
-  "version": "0.1.14",
+  "version": "0.1.15",
   "description": "Tiny state management library",
   "main": "dist/bundle.common.min.js",
   "module": "dist/bundle.min.js",
@@ -38,6 +38,7 @@
   "homepage": "https://github.com/edwinm/cuprum#readme",
   "dependencies": {},
   "devDependencies": {
+    "@rollup/plugin-replace": "^2.3.3",
     "@types/mocha": "^7.0.2",
     "@types/node": "^14.0.4",
     "@typescript-eslint/eslint-plugin": "^3.0.2",

rollup.config.js

@@ -1,5 +1,7 @@
 import typescript from "rollup-plugin-typescript2";
 import { terser } from "rollup-plugin-terser";
+import replace from "@rollup/plugin-replace";
+import pkg from "./package.json";
 
 export default {
   input: "src/cuprum.ts",
@@ -18,6 +20,9 @@ export default {
     },
   ],
   plugins: [
+    replace({
+      __buildVersion__: pkg.version,
+    }),
     typescript({
       clean: true,
     }),

src/cuprum.ts

@@ -1,5 +1,5 @@
-/**!
- @preserve cuprum 0.1.14
+/**
+ cuprum __buildVersion__
  @copyright 2020 Edwin Martin <edwin@bitstorm.org>
  @license MIT
  */