update aframe-loader-3dtiles-component: fix load errors

[Algorush]

Added check for this.viewportSize to the Tick function in aframe-loader-3dtiles-component.js to prevent error with undefined value described in this issue: #633
Also same issue: #661

[vincentfretin]

Is this 3DStreet/aframe-loader-3dtiles-component#9 ? This PR should really be on the board in the review column.
Does the other PRs in https://github.com/3DStreet/aframe-loader-3dtiles-component/pulls also in the build? If yes those should be merged there.

[Algorush]

This PR should really be on the board in the review column.

yes, you right. Otherwise it gets confusing. I will remove PRs in 3DStreet

[Algorush]

Closed, because already have this PR: 3DStreet/aframe-loader-3dtiles-component#9

[vincentfretin]

Yeah but you need to copy the file in 3dstreet repository, so you still need this PR.

[kfarr]

Do we need both the minified and unminified versions here?
nevermind, I removed the unminified file and files that used them

[kfarr]

@Algorush I will wait to merge this until you can confirm that the https://github.com/3DStreet/aframe-loader-3dtiles-component/ repo is actually up-to-date with what is intended to be in the 3dstreet repo

[Algorush]

Updated lib to the last version in last commit