Update cargo, books

Author: ehuss

Cargo.lock

@@ -307,7 +307,7 @@ dependencies = [
  "glob",
  "hex 0.4.0",
  "home",
- "humantime",
+ "humantime 2.0.0",
  "ignore",
  "im-rc",
  "jobserver",
@@ -1013,7 +1013,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aafcde04e90a5226a6443b7aabdb016ba2f8307c847d524724bd9b346dd1a2d3"
 dependencies = [
  "atty",
- "humantime",
+ "humantime 1.3.0",
  "log",
  "regex",
  "termcolor",
@@ -1026,7 +1026,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44533bbbb3bb3c1fa17d9f2e4e38bbbaf8396ba82193c4cb1b6445d711445d36"
 dependencies = [
  "atty",
- "humantime",
+ "humantime 1.3.0",
  "log",
  "regex",
  "termcolor",
@@ -1454,6 +1454,12 @@ dependencies = [
  "quick-error",
 ]
 
+[[package]]
+name = "humantime"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9b6c53306532d3c8e8087b44e6580e10db51a023cf9b433cea2ac38066b92da"
+
 [[package]]
 name = "hyper"
 version = "0.12.31"
@@ -2647,7 +2653,7 @@ dependencies = [
  "clap",
  "derive_more",
  "env_logger 0.6.2",
- "humantime",
+ "humantime 1.3.0",
  "lazy_static 1.3.0",
  "log",
  "rls-span",