Update RxDataSources to build against Swift 4.2

Author: Clack Cole

projects.json

@@ -1989,46 +1989,17 @@
     "maintainer": "[email protected]",
     "compatibility": [
       {
-        "version": "3.0",
-        "commit": "c06ebe2207ed3a74d69a9d9b9bb59b48b64a09b4"
+        "version": "4.2",
+        "commit": "5458733cb4d2a1ca6a457804921a5fac4b72fca2"
       }
     ],
     "platforms": [
       "Darwin"
     ],
     "actions": [
       {
-        "action": "BuildXcodeProjectTarget",
-        "project": "Pods/Pods.xcodeproj",
-        "target": "Pods-RxDataSources",
-        "destination": "generic/platform=iOS",
-        "configuration": "Release",
-        "tags": "sourcekit",
-        "xfail": {
-          "compatibility": {
-            "3.0": {
-              "branch": {
-                "master": "https://bugs.swift.org/browse/SR-8271"
-              }
-            }
-          }
-        }
-      },
-      {
-        "action": "BuildXcodeProjectTarget",
-        "project": "Pods/Pods.xcodeproj",
-        "target": "Pods-Example",
-        "destination": "generic/platform=iOS",
-        "configuration": "Release",
-        "xfail": {
-          "compatibility": {
-            "3.0": {
-              "branch": {
-                "master": "https://bugs.swift.org/browse/SR-8271"
-              }
-            }
-          }
-        }
+        "action": "BuildSwiftPackage",
+        "configuration": "release"
       }
     ]
   },