oatpp, oatpp-test: update to 1.3.0-latest

[Totto16]

This updates oatpp and oatpp-test to the latest upstream release.

The name of the new version is 1.3.0-latest, so NON SemVer (which is bad). So we have to make a decision, since meson only supports SemVer version names (which is good):

• just call it 1.3.0 and make the wrap version 1.3.0-3
• call the version 1.3.1 and call the wrap version 1.3.1-1
• not even make a wrap release

I chose the first option, since I find it more reasonable imo. Feel free to correct me.

This hopefully fixes a few issue with this wrap, we had earlier, like the incorrect tests on windows (see #1031)

This is still WIP, since I'm testing that locally atm.