Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 6.4.0
• Cross-platform modules: 6.4.1
• Android Runtime: 6.4.1
• iOS Runtime: 6.4.0
• Plugin(s): -

Describe the bug
According to According to #8207, the HtmlView should support new properties like color, link-color and font-size.
We want to try out the new features added to the HtmlView, so we try to style it in CSS like this:

.html-view {
    font-size: 16;
    color: #808080;
    link-color: #FF44FF;
}

While it works correctly on Android, it only works partially on iOS 12 (correct font-size and correct darkgrey text-color but it shows just the default blue link-color) and it does not work at all on iOS 13, as all the text is just black (only the font-size is set correctly). See the result in the screenshot below:

When trying to set those properties in XML like this:

On Android and iOS 12, the color is set correctly to the darkgrey tone, but the font-size and the link-color are not set correctly. On iOS 13 none of the properties are set correctly. The text and the link is black and it has the default font-size.

To Reproduce
Just open the sample app provided below.

Expected behavior
When setting those prperties in CSS or XML, they should be applied correctly to the HtmlView component.

Sample project
HtmlViewIssue.zip