Update package dependencies to 0.1.3

Examples/Echo/Swift/SwiftPM/Package.swift

@@ -34,7 +34,7 @@ import PackageDescription
 let package = Package (
     name: "Echo",
     dependencies: [
-        .Package(url: "https://github.com/grpc/grpc-swift.git", Version(0,1,2)),
+        .Package(url: "https://github.com/grpc/grpc-swift.git", Version(0,1,3)),
         .Package(url: "https://github.com/apple/swift-protobuf.git", Version(0,9,24)),
     ]
 )

Examples/Simple/Package.swift

@@ -34,6 +34,6 @@ import PackageDescription
 let package = Package (
     name: "Simple",
     dependencies: [
-        .Package(url: "https://github.com/grpc/grpc-swift.git", Version(0,1,2)),
+        .Package(url: "https://github.com/grpc/grpc-swift.git", Version(0,1,3)),
     ]
 )