refactor: refactor phc api

Author: zdm

lib/phc.js

@@ -6,7 +6,7 @@ const NAME_RE = /^[\da-z-]{1,32}$/,
             String.raw`\$(?<id>[\da-z-]{1,32})` + // id
             String.raw`(?:\$v=(?<version>\d+))?` + // version
             String.raw`(?:\$(?<params>[\da-z-]{1,32}=[\d+./A-Za-z-]+(?:,[\da-z-]{1,32}=[\d+./A-Za-z-]+)*))?` + // params
-            String.raw`(?:\$(?<salt>[\d+/A-Za-z]+))?` + // salt
+            String.raw`(?:\$(?<salt>[\d+./A-Za-z-]+))?` + // salt
             String.raw`(?:\$(?<hash>[\d+/A-Za-z]+))?` + // hash
             String.raw`$` );