Updates containerization to 0.43.0. (#2208)

Package.resolved

@@ -1,5 +1,5 @@
 {
-  "originHash" : "277d874bbc7e5360092b7cd5caefe5759a7f246908ee9b2bd13b854792e67a7f",
+  "originHash" : "59d71ab6424a1eff8594d6cb1c12f78c19b8ff28d2780fae4db3abfe2fb4b13c",
   "pins" : [
     {
       "identity" : "async-http-client",
@@ -15,8 +15,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/containerization.git",
       "state" : {
-        "revision" : "c0185aea5c04fcd4d1cfe9359e0066a380835403",
-        "version" : "0.42.0"
+        "revision" : "2faaf9b4aff48a4745ef3d26c3f1450c1228fdf0",
+        "version" : "0.43.0"
       }
     },
     {

Package.swift

@@ -23,7 +23,7 @@ import PackageDescription
 let releaseVersion = ProcessInfo.processInfo.environment["RELEASE_VERSION"] ?? "0.0.0"
 let gitCommit = ProcessInfo.processInfo.environment["GIT_COMMIT"] ?? "unspecified"
 let builderShimVersion = "0.13.1"
-let scVersion = "0.42.0"
+let scVersion = "0.43.0"
 
 let package = Package(
     name: "container",