diff --git a/Cargo.lock b/Cargo.lock
index 657831b..eaec52a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -149,19 +149,6 @@
 ]
 
 [[package]]
-name = "bit-set"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bit-vec 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
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-
-[[package]]
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@@ -312,7 +299,6 @@
  "opener 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl 0.10.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "pretty_env_logger 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "proptest 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
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  "rustfix 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "same-file 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -329,7 +315,6 @@
  "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "url_serde 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "varisat 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -1156,11 +1141,6 @@
 
 [[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
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@@ -1399,11 +1379,6 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
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@@ -1881,14 +1856,6 @@
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
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-[[package]]
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@@ -1957,24 +1924,6 @@
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
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@@ -2137,25 +2086,6 @@
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@@ -4181,76 +4100,6 @@
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@@ -4261,11 +4110,6 @@
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 [[package]]
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@@ -4403,8 +4239,6 @@
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-"checksum bit-set 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6f1efcc46c18245a69c38fcc5cc650f16d3a59d034f3106e9ed63748f695730a"
-"checksum bit-vec 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4440d5cb623bb7390ae27fec0bb6c61111969860f8e3ae198bfa0663645e67cf"
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-"checksum hashbrown 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "29fba9abe4742d586dfd0c06ae4f7e73a1c2d86b856933509b269d82cdf06e18"
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-"checksum leb128 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "3576a87f2ba00f6f106fdfcd16db1d698d648a26ad8e0573cad8537c3c362d2a"
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@@ -4568,15 +4400,12 @@
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-"checksum partial_ref 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b2b85fa89a02abf59d36821c373b5ed38c8e075505f1a08618b000fce81229bc"
-"checksum partial_ref_derive 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "759319b785d033e4279ec98fb2d1fb767a1af5b6a8996086c07168169cff079b"
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@@ -4648,7 +4476,6 @@
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@@ -4731,20 +4558,12 @@
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diff --git a/src/tools/cargo b/src/tools/cargo
index 807429e..4c1fa54 160000
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit 807429e1b6da4e2ec52488ef2f59e77068c31e1f
+Subproject commit 4c1fa54d10f58d69ac9ff55be68e1b1c25ecb816