fix prng.ts so it works in browser

import

@@ -429,6 +429,7 @@ const FRAGILE = new Set([
   // `sim/dex.ts` has to have its loading reworked to depend on everything up front so that it can
   // be used in a browser environment where synchronous `require` and `fs` APIs don't exist.
   'sim/dex.ts',
+  'sim/prng.ts',
   'sim/global-types.ts',
   'sim/global-variables.d.ts',
 ]);
@@ -504,6 +505,7 @@ const SKIP_TESTS = new Set([
   'test/sim/state.js',
   'test/sim/tools/multi-random-runner.js',
   'test/sim/misc/inversebattle.js',
+  'test/sim/misc/partnersincrime.js',
 ]);
 // Any file that hasn't been 'OVERRIDDEN' we need to copy over from PS
 const COPIED = new Set([...FILES].filter(f => !OVERRIDDEN.has(f)));

sim/sim/prng.ts

@@ -14,7 +14,6 @@
 
 import {Chacha20} from 'ts-chacha20';
 import {Utils} from '../lib/utils';
-import * as crypto from 'crypto';
 
 export type PRNGSeed = `${'sodium' | 'gen5' | number},${string}`;
 export type SodiumRNGSeed = ['sodium', string];
@@ -159,7 +158,7 @@ export class PRNG {
 	}
 
 	static generateSeed(): PRNGSeed {
-		return PRNG.convertSeed(SodiumRNG.generateSeed());
+		return PRNG.convertSeed(Gen5RNG.generateSeed());
 	}
 	static convertSeed(seed: SodiumRNGSeed | Gen5RNGSeed): PRNGSeed {
 		return seed.join(',') as PRNGSeed;
@@ -207,13 +206,6 @@ export class SodiumRNG implements RNG {
 		// reading big-endian
 		return buf.slice(32, 36).reduce((a, b) => a * 256 + b);
 	}
-
-	static generateSeed(): SodiumRNGSeed {
-		return [
-			'sodium',
-			crypto.randomBytes(16).toString('hex'),
-		];
-	}
 }
 
 /**