Bumped and fixed the API updates for cargo v0.40.0 -> v0.42.0 (#192)

* Bumped and fixed the API updates for cargo v0.40.0 -> v0.41.0

* Updating Cargo dependency to 0.42.0 and tabwriter to 1.2.1
diff --git a/Cargo.lock b/Cargo.lock
index aad4d91..f8a3328 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,1276 +4,1278 @@
 name = "adler32"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d2e7343e7fc9de883d1b0341e0b13970f764c14101234857d2ddafa1cb1cac2"
 
 [[package]]
 name = "aho-corasick"
-version = "0.7.6"
+version = "0.7.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f56c476256dc249def911d6f7580b5fc7e875895b5d7ee88f5d602208035744"
 dependencies = [
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr",
 ]
 
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 dependencies = [
- "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi",
 ]
 
 [[package]]
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+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
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- "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hermit-abi",
+ "libc",
+ "winapi",
 ]
 
 [[package]]
 name = "autocfg"
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+checksum = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
+
+[[package]]
+name = "autocfg"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
 [[package]]
 name = "backtrace"
-version = "0.3.40"
+version = "0.3.43"
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+checksum = "7f80256bc78f67e7df7e36d77366f636ed976895d91fe2ab9efa3973e8fe8c4f"
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- "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys",
+ "cfg-if",
+ "libc",
+ "rustc-demangle",
 ]
 
 [[package]]
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 version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d6575f128516de27e3ce99689419835fce9643a9b215a14d2b5b685be018491"
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- "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc",
+ "libc",
 ]
 
 [[package]]
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+checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
+
+[[package]]
+name = "bitmaps"
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+checksum = "81e039a80914325b37fde728ef7693c212f0ac913d5599607d7b95a9484aae0b"
+dependencies = [
+ "typenum",
+]
 
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- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr",
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 [[package]]
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+checksum = "716960a18f978640f25101b5cbf1c6f6b0d3192fab36a2d98ca96f0ecbe41010"
 
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diff --git a/Cargo.toml b/Cargo.toml
index 25744ac..9a3b620 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cargo-outdated"
-version = "0.9.3"
+version = "0.9.4"
 authors = [
     "Kevin K. <kbknapp@gmail.com>",
     "Frederick Z. <frederick888@tsundere.moe>",
@@ -27,7 +27,7 @@
 name = "cargo-outdated"
 
 [dependencies]
-cargo = "0.40"
+cargo = "0.42"
 docopt = "1.0.0"
 env_logger = "0.7.0"
 failure = "0.1.1"
@@ -35,7 +35,7 @@
 serde = {version="1.0.11", features = ["derive"]}
 serde_derive = "1.0.11"
 serde_json = "1.0.3"
-tabwriter = "~1.1.0"
+tabwriter = "1.2.1"
 tempfile = "3"
 toml = "~0.5.0"
 
diff --git a/src/cargo_ops/elaborate_workspace.rs b/src/cargo_ops/elaborate_workspace.rs
index 2ba8e42..fa2af86 100644
--- a/src/cargo_ops/elaborate_workspace.rs
+++ b/src/cargo_ops/elaborate_workspace.rs
@@ -56,7 +56,9 @@
             options.all_features(),
             options.no_default_features(),
         );
-        let (packages, resolve) = ops::resolve_ws_with_opts(workspace, opts, &specs)?;
+        let ws_resolve = ops::resolve_ws_with_opts(workspace, opts, &specs)?;
+        let packages = ws_resolve.pkg_set;
+        let resolve = ws_resolve.workspace_resolve.expect("Error getting workspace resolved");
         let mut pkgs = HashMap::new();
         let mut pkg_deps = HashMap::new();
         for pkg in packages.get_many(packages.package_ids())? {