Tests: Iframe event order (#568)

* add failing test

* assert order of events

* defer attaching of iframe till FullSnapshot is done
Fixes: https://github.com/rrweb-io/rrweb/issues/567

* correct event order in iframe integration test snapshot

* trigger build

* trigger build

* Move settimeout responsibility to snapshot
https://github.com/rrweb-io/rrweb-snapshot/pull/78

* upgrade rrweb-snapshot to 1.1.4

* DRY record tests

* cleanup

* Upgrade puppeteer to 9.1.1
for (hopefully) more consistent behaviour between CI and development

* make input bigger to prevent triggering scroll events

* page.waitFor is deprecated
more info: https://github.com/puppeteer/puppeteer/issues/6214

* Set os and distro for Travis ci

Co-authored-by: yz-yu <yanzhen@smartx.com>

test/__snapshots__/record.test.ts.snap

@@ -42,7 +42,8 @@ exports[`async-checkout 1`] = `
                     \\"type\\": 2,
                     \\"tagName\\": \\"input\\",
                     \\"attributes\\": {
-                      \\"type\\": \\"text\\"
+                      \\"type\\": \\"text\\",
+                      \\"size\\": \\"40\\"
                     },
                     \\"childNodes\\": [],
                     \\"id\\": 6
@@ -283,7 +284,8 @@ exports[`custom-event 1`] = `
                     \\"type\\": 2,
                     \\"tagName\\": \\"input\\",
                     \\"attributes\\": {
-                      \\"type\\": \\"text\\"
+                      \\"type\\": \\"text\\",
+                      \\"size\\": \\"40\\"
                     },
                     \\"childNodes\\": [],
                     \\"id\\": 6
@@ -369,7 +371,8 @@ exports[`stylesheet-rules 1`] = `
                     \\"type\\": 2,
                     \\"tagName\\": \\"input\\",
                     \\"attributes\\": {
-                      \\"type\\": \\"text\\"
+                      \\"type\\": \\"text\\",
+                      \\"size\\": \\"40\\"
                     },
                     \\"childNodes\\": [],
                     \\"id\\": 6