Revert Node 8 support workarounds

Revert "add ava-script to support old node"

This reverts commit 1703add.

Revert "use a custom script to call Rollup"

This reverts commit c878398.

Revert "detect the Rollup version based on Node version"

This reverts commit f027f5b.

Author: aminya

package.json

@@ -11,9 +11,9 @@
     "build:cjs": "tsc -p tsconfig.json",
     "build:es": "tsc -p tsconfig-esm.json",
     "postbuild": "npm run bundle",
-    "bundle": "node ./scripts/rollup-script.js",
+    "bundle": "rollup -c -f umd --file=bundle/worker.js --name=threads --silent -- dist-esm/worker/bundle-entry.js",
     "test": "npm run test:ava && npm run test:puppeteer:basic && npm run test:puppeteer:webpack",
-    "test:ava": "cross-env TS_NODE_FILES=true node ./scripts/ava-script.js",
+    "test:ava": "cross-env TS_NODE_FILES=true ava",
     "test:puppeteer:basic": "puppet-run --plugin=mocha --bundle=./test/workers/:workers/ --serve=./bundle/worker.js:/worker.js ./test/*.chromium*.ts",
     "test:puppeteer:webpack": "puppet-run --serve ./test/webpack/dist/app.web/0.worker.js --serve ./test/webpack/dist/app.web/1.worker.js --plugin=mocha ./test/webpack/webpack.chromium.mocha.ts",
     "posttest": "tslint --project .",
@@ -88,8 +88,6 @@
     "rollup": "^2.26.10",
     "@rollup/plugin-commonjs": "^15.0.0",
     "@rollup/plugin-node-resolve": "^9.0.0",
-    "rollup-plugin-commonjs": "^10.1.0",
-    "rollup-plugin-node-resolve": "^5.2.0",
     "threads-plugin": "^1.3.3",
     "tiny-worker": "^2.2.0",
     "ts-loader": "^8.0.3",

rollup.config.js

@@ -1,11 +1,5 @@
-let commonjs, nodeResolve;
-if (parseFloat(process.version.match(/^v(\d+\.\d+)/)[1]) < 10) {
-  commonjs = require("rollup-plugin-commonjs");
-  nodeResolve = require("rollup-plugin-node-resolve");
-} else {
-  commonjs = require("@rollup/plugin-commonjs");
-  nodeResolve = require("@rollup/plugin-node-resolve").nodeResolve;
-}
+const commonjs = require("@rollup/plugin-commonjs")
+const { nodeResolve } = require("@rollup/plugin-node-resolve")
 
 module.exports = {
   plugins: [

scripts/ava-script.js

@@ -1,20 +1,6 @@
-/* tslint:disable */
-//@ts-ignore
-let commonjs, nodeResolve; //@ts-ignore
-//@ts-ignore
-if (parseFloat(process.version.match(/^v(\d+\.\d+)/)[1]) < 10) {
-  //@ts-ignore
-  commonjs = require("rollup-plugin-commonjs");
-  //@ts-ignore
-  nodeResolve = require("rollup-plugin-node-resolve");
-} else {
-  //@ts-ignore
-  commonjs = require("@rollup/plugin-commonjs");
-  //@ts-ignore
-  nodeResolve = require("@rollup/plugin-node-resolve").nodeResolve;
-}
+import commonjs from "@rollup/plugin-commonjs"
+import { nodeResolve } from "@rollup/plugin-node-resolve"
 
-//@ts-ignore
 export default {
   plugins: [
     nodeResolve({