Fix TypeScript regex (#1527)

Turns out n.value is NaN for regexes in typescript, go figure. Just moving the two if statements is working to fix the issue.

Fixes #1526

src/printer.js

@@ -1016,12 +1016,12 @@ function genericPrintNoParens(path, options, print, args) {
     // Babel 6 Literal split
     case "StringLiteral":
     case "Literal":
-      if (typeof n.value === "number") {
-        return printNumber(n.raw);
-      }
       if (n.regex) {
         return printRegex(n.regex);
       }
+      if (typeof n.value === "number") {
+        return printNumber(n.raw);
+      }
       if (typeof n.value !== "string") {
         return "" + n.value;
       }

tests/regex/jsfmt.spec.js

@@ -1 +1 @@
-run_spec(__dirname, null, ["babylon"]);
+run_spec(__dirname, null, ["babylon", "typescript"]);