Update package configuration for Examples to 0.1.2

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(0,1,1)),
+        .Package(url: "https://github.com/grpc/grpc-swift.git", Version(0,1,2)),
         .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(0,1,1)),
+        .Package(url: "https://github.com/grpc/grpc-swift.git", Version(0,1,2)),
     ]
 )

Examples/Simple/main.swift

@@ -75,7 +75,7 @@ func client() throws {
                              ["z": "zither"]])
 
 
-    try! call.perform(message: message!, metadata:metadata) {
+    try! call.start(.unary, metadata:metadata, message:message) {
       (response) in
       print("status:", response.statusCode)
       print("statusMessage:", response.statusMessage!)