Fixed one issue with the podspec file with cocoapods 1.8.2. It's stil…

…l not liking :git and :tag for some reason when I do a pod spec lint.

Update the podspec to 4.3.2 (I messed up not checking this file in be…

…fore I tagged).

Slight update to the iOS 11 readme section.

Update the podspec to 4.3.2 (I messed up not checking this file in be…

…fore I tagged).

Fixed documentation issue from pod lib lint validation.

Adding Heading Request support

Update framework version

Update pod spec to v4.1.0

Update version to v4.0.0

Bump version number to v3.0.3