Update from dpericated opencv API

[ruffsl]

Fixes #60

[ToniRV]

Nice, seems like very small changes, is this OpenCV 3.3.1 backwards compatible?
I mean obviously they are not looking at CI. It would be nice if we could support both though.
Otherwise, we will keep this as a separate branch.

[ruffsl]

I'm not sure. Do you see a way this could support both? Looks like headers massage have changed between the two and we may just need some if defs.

[akashsharma02]

Is there any plan on getting this merged, looks like there was some problem with OpenCV installation in the docker environment? If not I can submit another PR for this.
Also, I do not think OpenCV 4 is backwards compatible with OpenCV 3, because the anonymous enums used have been redefined now.

[ruffsl]

@akashsharma02 , do you see anything else this might need?

[akashsharma02]

@ruffsl I'm actually not sure since the failure was a build issue with OpenCV. I have a fork with the minor changes I've made, maybe you can take a look at that.

[ToniRV]

Closing as #100 allows for OpenCV 3 & 4, thanks!