Package.swift: Bump CZ to 0.7.0 (#584)

Closes #585

Has a fix for if a uid doesn't exist in /etc/passwd.

Package.resolved

@@ -1,5 +1,5 @@
 {
-  "originHash" : "29003ad0ff703439089a8e3a9d41bfe1a1d447679a40bffe701c492de6d099db",
+  "originHash" : "332015d210a932723b89ffa586eaecac3ccff1c8a91856560a11f963c3451206",
   "pins" : [
     {
       "identity" : "async-http-client",
@@ -15,14 +15,14 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/containerization.git",
       "state" : {
-        "revision" : "4099bdccd615bca49a2ea9cdb5b20dc5c5bd0fea",
-        "version" : "0.6.2"
+        "revision" : "9aa552593b4882055d7b77bbb04911442bbd583d",
+        "version" : "0.7.0"
       }
     },
     {
       "identity" : "dns",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/Bouke/DNS.git",
+      "location" : "https://github.com/Bouke/DNS",
       "state" : {
         "revision" : "78bbd1589890a90b202d11d5f9e1297050cf0eb2",
         "version" : "1.2.0"
@@ -31,7 +31,7 @@
     {
       "identity" : "dnsclient",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/orlandos-nl/DNSClient.git",
+      "location" : "https://github.com/orlandos-nl/DNSClient",
       "state" : {
         "revision" : "551fbddbf4fa728d4cd86f6a5208fe4f925f0549",
         "version" : "2.4.4"

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 = "0.6.0"
-let scVersion = "0.6.2"
+let scVersion = "0.7.0"
 
 let package = Package(
     name: "container",