fix: fix always-false condition (#464)

Author: xiaoxiaojx

lib/ExportsFieldPlugin.js

@@ -155,7 +155,7 @@ module.exports = class ExportsFieldPlugin {
 
 						if (
 							invalidSegmentRegEx.exec(relativePath.slice(2)) !== null &&
-							deprecatedInvalidSegmentRegEx.test(relativePath.slice(2)) !== null
+							deprecatedInvalidSegmentRegEx.test(relativePath.slice(2))
 						) {
 							if (paths.length === i) {
 								return callback(