Update for FAN 5.8.0
MODIFY
adapters/Facebook/CHANGELOG.md
adapters/Facebook/CHANGELOG.md
## Facebook iOS Mediation Adapter Changelog
+#### Version 5.8.0.0
+- Verified compatibility with FAN SDK 5.8.0.
+
#### Next Version
- Adapter now returns a non-zero `mediaContent` aspect ratio regardless if the media view is rendered or not.

MODIFY
adapters/Facebook/FacebookAdapter/GADMAdapterFacebookConstants.h
adapters/Facebook/FacebookAdapter/GADMAdapterFacebookConstants.h
// limitations under the License.
/// Facebook mediation network adapter version.
-static NSString *const kGADMAdapterFacebookVersion = @"5.7.1.2";
+static NSString *const kGADMAdapterFacebookVersion = @"5.8.0.0";
static NSString *const kGADMAdapterFacebookOpenBiddingPubID = @"placement_id";

Update for FAN 5.8.0