Update parseAliasDeclaration to match single quote

- Matches foo="bar" and foo='bar'
- Does not match foo="bar' or foo='bar"

src/Alias.ts

@@ -36,7 +36,7 @@ export function printAliases(): void {
 
 // Returns true if successful, false otherwise
 export function parseAliasDeclaration(dec: string, global = false): boolean {
-  const re = /^([\w|!|%|,|@|-]+)="(.+)"$/;
+  const re = /^([\w|!|%|,|@|-]+)=(("(.+)")|('(.+)'))$/;
   const matches = dec.match(re);
   if (matches == null || matches.length != 3) {
     return false;