diff --git a/Cargo.lock b/Cargo.lock
index 9b8a230..530f595 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -350,7 +350,7 @@ dependencies = [
 
 [[package]]
 name = "ring"
-version = "0.16.14"
+version = "0.16.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cc 1.0.54 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -395,7 +395,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde_derive"
-version = "1.0.111"
+version = "1.0.112"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -482,7 +482,7 @@ dependencies = [
  "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.111 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -495,7 +495,7 @@ dependencies = [
  "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.111 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.53 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha1 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -513,17 +513,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "structopt"
-version = "0.3.14"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "clap 2.33.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt-derive 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt-derive 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "structopt-derive"
-version = "0.4.7"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -683,13 +683,13 @@ dependencies = [
  "pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "privdrop 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "ring 0.16.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ring 0.16.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.111 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_yaml 0.8.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "signal 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "siphasher 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "yaml-rust 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -845,13 +845,13 @@ dependencies = [
 "checksum rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
 "checksum redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)" = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
 "checksum remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
-"checksum ring 0.16.14 (registry+https://github.com/rust-lang/crates.io-index)" = "06b3fefa4f12272808f809a0af618501fdaba41a58963c5fb72238ab0be09603"
+"checksum ring 0.16.15 (registry+https://github.com/rust-lang/crates.io-index)" = "952cd6b98c85bbc30efa1ba5783b8abf12fec8b3287ffa52605b9432313e34e4"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum ryu 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum serde 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)" = "736aac72d1eafe8e5962d1d1c3d99b0df526015ba40915cb3c49d042e92ec243"
-"checksum serde_derive 1.0.111 (registry+https://github.com/rust-lang/crates.io-index)" = "3f2c3ac8e6ca1e9c80b8be1023940162bf81ae3cffbb1809474152f2ce1eb250"
+"checksum serde_derive 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)" = "bf0343ce212ac0d3d6afd9391ac8e9c9efe06b533c8d33f660f6390cc4093f57"
 "checksum serde_json 1.0.53 (registry+https://github.com/rust-lang/crates.io-index)" = "993948e75b189211a9b31a7528f950c6adc21f9720b6438ff80a7fa2f864cea2"
 "checksum serde_yaml 0.8.13 (registry+https://github.com/rust-lang/crates.io-index)" = "ae3e2dd40a7cdc18ca80db804b7f461a39bb721160a85c9a1fa30134bf3c02a5"
 "checksum sha1 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2579985fda508104f7587689507983eadd6a6e84dd35d6d115361f530916fa0d"
@@ -865,8 +865,8 @@ dependencies = [
 "checksum stdweb-internal-macros 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "58fa5ff6ad0d98d1ffa8cb115892b6e69d67799f6763e162a1c9db421dc22e11"
 "checksum stdweb-internal-runtime 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "213701ba3370744dcd1a12960caa4843b3d68b4d1c0a5d575e0d65b2ee9d16c0"
 "checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
-"checksum structopt 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)" = "863246aaf5ddd0d6928dfeb1a9ca65f505599e4e1b399935ef7e75107516b4ef"
-"checksum structopt-derive 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "d239ca4b13aee7a2142e6795cbd69e457665ff8037aed33b3effdc430d2f927a"
+"checksum structopt 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "de2f5e239ee807089b62adce73e48c625e0ed80df02c7ab3f068f5db5281065c"
+"checksum structopt-derive 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "510413f9de616762a4fbeab62509bf15c729603b72d7cd71280fbca431b1c118"
 "checksum syn 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)" = "93a56fabc59dce20fe48b6c832cc249c713e7ed88fa28b0ee0a3bfcaae5fe4e2"
 "checksum syn-mid 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7be3539f6c128a931cf19dcee741c1af532c7fd387baa739c03dd2e96479338a"
 "checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"