Raise minimum NIO version to 2.36.0 (#1444)
Raise minimum NIO version to 2.36.0 (#1444)

With the merge of the async/await support to main we now require NIO
2.36.0, which is the release that contains the new availability
requirements for EventLoopFuture.get

Resolves #1443
grpc/grpc-swift,grpc/grpc-swift,grpc/grpc-swift,grpc/grpc-swift,grpc/grpc-swift