Add PATCH support for upload on Android

[cosmith]

Hi! Thanks for the great library.

This PR enables support for PATCH requests on Android.

I submitted the PR on the 0.9.7 branch since this feature already works perfectly on iOS, which caused us some confusion as our code didn't seem wrong but didn't work on Android...

Let me know what you think! Maybe I missed something.

[cosmith]

Now that I take a look at the iOS code it looks like it is the same there (

react-native-fetch-blob/src/ios/RNFetchBlobReqBuilder.m

Line 90 in b98143d

if([[method lowercaseString] isEqualToString:@"post"] || [[method lowercaseString] isEqualToString:@"put"]) {

) so I'm not sure why it works on iOS?

[wkh237]

Thanks for the PR, I'll add some test case for insure IOS and Android both working properly for PATCH requests : )

[cosmith]

Thanks!