update Rollup, remove some superfluous deps

src/api/utils/fs_utils.ts

@@ -0,0 +1,46 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+export function mkdirp(dir: string) {
+	const parent = path.dirname(dir);
+	if (parent === dir) return;
+
+	mkdirp(parent);
+
+	try {
+		fs.mkdirSync(dir);
+	} catch (err) {
+		// ignore
+	}
+}
+
+export function rimraf(thing: string) {
+	if (!fs.existsSync(thing)) return;
+
+	const stats = fs.statSync(thing);
+
+	if (stats.isDirectory()) {
+		fs.readdirSync(thing).forEach(file => {
+			rimraf(path.join(thing, file));
+		});
+
+		fs.rmdirSync(thing);
+	} else {
+		fs.unlinkSync(thing);
+	}
+}
+
+export function copy(from: string, to: string) {
+	if (!fs.existsSync(from)) return;
+
+	const stats = fs.statSync(from);
+
+	if (stats.isDirectory()) {
+		fs.readdirSync(from).forEach(file => {
+			copy(path.join(from, file), path.join(to, file));
+		});
+	} else {
+		mkdirp(path.dirname(to));
+		fs.writeFileSync(to, fs.readFileSync(from));
+	}
+}