Fixes check against windows paths

Author: arcanis

src/cli/commands/policies.js

@@ -12,7 +12,7 @@ import {stringify} from '../../lockfile';
 import {satisfiesWithPrereleases} from '../../util/semver.js';
 import {NODE_BIN_PATH} from '../../constants';
 
-const V2_NAMES = ['stable', 'berry', 'stable', 'canary', 'v2', '2'];
+const V2_NAMES = ['berry', 'stable', 'canary', 'v2', '2'];
 
 const isLocalFile = (version: string) => version.match(/^\.{0,2}[\\/]/) || path.isAbsolute(version);
 const isV2Version = (version: string) => satisfiesWithPrereleases(version, '>=2.0.0');

src/util/child.js

@@ -18,7 +18,7 @@ let uid = 0;
 export const exec = promisify(child.exec);
 
 function validate(program: string, opts?: Object = {}) {
-  if (program.includes('/')) {
+  if (program.match(/[\\\/]/)) {
     return;
   }