Update .swift-version to 4.2, fix tests and ref latest wickwirew/Runtime

Author: Mike Pollard

.swift-version

@@ -1 +1 @@
-4.1
+4.2

Package.resolved

@@ -9,7 +9,7 @@ let package = Package(
     ],
 
     dependencies: [
-        .package(url: "https://github.com/wickwirew/Runtime.git", from: "0.6.0"),
+        .package(url: "https://github.com/wickwirew/Runtime.git", .revision("40cdfbad9650512507c060824e1c4e9fc2ca721d")),
 
         // ⏱ Promises and reactive-streams in Swift built for high-performance and scalability.
         .package(url: "https://github.com/vapor/core.git", from: "3.0.0"),

Package.swift

@@ -76,7 +76,7 @@ class FieldExecutionStrategyTests: XCTestCase {
                 "locations": [
                     ["column": 3, "line": 1]
                 ],
-                "message": "exampleError(\"bang: bang\")",
+                "message": "exampleError(msg: \"bang: bang\")",
                 "path":["bang"]
             ]
         ]
@@ -100,70 +100,70 @@ class FieldExecutionStrategyTests: XCTestCase {
             "locations": [
                 ["column": 3, "line": 1]
             ],
-            "message": "exampleError(\"bang: a\")",
+            "message": "exampleError(msg: \"bang: a\")",
             "path":["a"]
         ],
         [
             "locations": [
                 ["column": 11, "line": 1]
             ],
-            "message": "exampleError(\"bang: b\")",
+            "message": "exampleError(msg: \"bang: b\")",
             "path":["b"]
         ],
         [
             "locations": [
                 ["column": 19, "line": 1]
             ],
-            "message": "exampleError(\"bang: c\")",
+            "message": "exampleError(msg: \"bang: c\")",
             "path":["c"]
         ],
         [
             "locations": [
                 ["column": 27, "line": 1]
             ],
-            "message": "exampleError(\"bang: d\")",
+            "message": "exampleError(msg: \"bang: d\")",
             "path":["d"]
         ],
         [
             "locations": [
                 ["column": 35, "line": 1]
             ],
-            "message": "exampleError(\"bang: e\")",
+            "message": "exampleError(msg: \"bang: e\")",
             "path":["e"]
         ],
         [
             "locations": [
                 ["column": 43, "line": 1]
             ],
-            "message": "exampleError(\"bang: f\")",
+            "message": "exampleError(msg: \"bang: f\")",
             "path":["f"]
         ],
         [
             "locations": [
                 ["column": 51, "line": 1]
             ],
-            "message": "exampleError(\"bang: g\")",
+            "message": "exampleError(msg: \"bang: g\")",
             "path":["g"]
         ],
         [
             "locations": [
                 ["column": 59, "line": 1]
             ],
-            "message": "exampleError(\"bang: h\")",
+            "message": "exampleError(msg: \"bang: h\")",
             "path":["h"]
         ],
         [
             "locations": [
                 ["column": 67, "line": 1]
             ],
-            "message": "exampleError(\"bang: i\")",
+            "message": "exampleError(msg: \"bang: i\")",
             "path":["i"]
         ],
         [
             "locations": [
                 ["column": 75, "line": 1]
             ],
-            "message": "exampleError(\"bang: j\")",
+            "message": "exampleError(msg: \"bang: j\")",
             "path":["j"]
         ],
         ]