upgrade fake timers and others (#2612)

* Upgrade dependencies (includes breaking API in Fake Timers)

* fake-timers: no longer creating dates using the original Date class, but a subclass (proxy)

* Clarify intent and fix breaking test on global restore

This was originally added (really rectified) in commit ac17669 (2013) when Sinon's fake-timers code allowed installing non-standard/unknown timers.

Since the latest fake-timers no longer allows this, we have to do the test against a real/existing timer that the library knows about. We supply a custom global to avoid any of the mentioned side effects of trying to delete built-ins in some environments.

* Clarify intent and fix breaking test concerning non-inherited timer

* fix test: fake-timers now installs all timers by default (including nextTick)

* Various micro-fixes in the tests

* Exclude Node timers and timers/promises modules from bundle

build.cjs

@@ -24,12 +24,15 @@ try {
  * @param done
  */
 function makeBundle(entryPoint, config, done) {
-    browserify(entryPoint, config).bundle(function (err, buffer) {
-        if (err) {
-            throw err;
-        }
-        done(buffer.toString());
-    });
+    browserify(entryPoint, config)
+        .exclude("timers")
+        .exclude("timers/promises")
+        .bundle(function (err, buffer) {
+            if (err) {
+                throw err;
+            }
+            done(buffer.toString());
+        });
 }
 
 makeBundle(
@@ -45,7 +48,7 @@ makeBundle(
     function (bundle) {
         var script = preamble + bundle;
         fs.writeFileSync("pkg/sinon.js", script); // WebWorker can only load js files
-    }
+    },
 );
 
 makeBundle(
@@ -59,7 +62,7 @@ makeBundle(
     function (bundle) {
         var script = preamble + bundle;
         fs.writeFileSync("pkg/sinon-no-sourcemaps.cjs", script);
-    }
+    },
 );
 
 makeBundle(
@@ -78,5 +81,5 @@ makeBundle(
 
         var script = preamble + intro + bundle + outro;
         fs.writeFileSync("pkg/sinon-esm.js", script);
-    }
+    },
 );