fix for loading iframes with custom web components in chrome

[megboehlert]

In chrome, custom web components in iframes are not loading when the script for creating the custom element is in the body tag of the iframe instead of the head tag.

Issue:

issue-720.mov

Fix:

fixed-720.mov

[changeset-bot]

🦋 Changeset detected

Latest commit: 267bf79

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 19 packages

Name	Type
rrweb-snapshot	Major
rrweb	Major
rrdom	Major
rrdom-nodejs	Major
rrweb-player	Major
@rrweb/all	Major
@rrweb/replay	Major
@rrweb/record	Major
@rrweb/types	Major
@rrweb/packer	Major
@rrweb/utils	Major
@rrweb/web-extension	Major
rrvideo	Major
@rrweb/rrweb-plugin-console-record	Major
@rrweb/rrweb-plugin-console-replay	Major
@rrweb/rrweb-plugin-sequential-id-record	Major
@rrweb/rrweb-plugin-sequential-id-replay	Major
@rrweb/rrweb-plugin-canvas-webrtc-record	Major
@rrweb/rrweb-plugin-canvas-webrtc-replay	Major

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