Update Cargo.lock and add book to gitignore.

.gitignore

@@ -4,3 +4,6 @@ target/
 
 # Code coverage results
 coverage/
+
+# mdBook output
+hooked-book/book/

Cargo.lock

@@ -419,6 +419,8 @@ dependencies = [
  "clap",
  "color-eyre",
  "hooked-library",
+ "owo-colors",
+ "subprocess",
  "tera",
 ]
 
@@ -916,6 +918,16 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
+[[package]]
+name = "subprocess"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c2e86926081dda636c546d8c5e641661049d7562a68f5488be4a1f7f66f6086"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "syn"
 version = "1.0.103"