[gjs/ewlsh/implicit-mainloop] Fix eslint.

[Evan Welsh <ewlsh src gnome org>]

commit 604f74081a6ddb423abd388112a9b97fd2355c4f
Author: Evan Welsh <contact evanwelsh com>
Date:   Sat Jan 30 12:50:57 2021 -0800

    Fix eslint.

 modules/core/_timers.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/modules/core/_timers.js b/modules/core/_timers.js
index 5434b827..5c70c438 100644
--- a/modules/core/_timers.js
+++ b/modules/core/_timers.js
@@ -33,13 +33,15 @@ function checkBigInt(n) {
 }
 
 function ToNumber(interval) {
+    /* eslint-disable no-implicit-coercion */
     if (typeof interval === 'number')
         return interval;
     else if (typeof interval === 'object')
-        return Number(interval.valueOf()) || Number(interval);
+        return +interval.valueOf() || +interval;
 
 
-    return Number(interval);
+    return +interval;
+    /* eslint-enable */
 }
 
 function setTimeout(callback, delay = 0, ...args) {