set mocha timeout from default (2000) to 5000

gfx · gfx · commit a54014600f42 · 2019-05-12T23:23:49.000+09:00
because IE11 takes more itme than the default
diff --git a/test/mocha.opts b/test/mocha.opts
@@ -1 +1,2 @@
 --require ts-node/register
+--timeout 5000
