v1.8.4: Some("") === None

Fixed:
  * Specified but empty proxies being used
    (71352aa3a6d2639d1b4a17225433a33fa539bcfd)
    (#109)

v1.8.3: eldritch

Fixed:
  * ssh-agent et al. auth support by porting current Cargo's code
    (68583a31e47a1ab5590ea1b5b70d6f9e57f23e97)
    (540257691e5ee6cea3a24dd2c0970e046af00da9)
    (c61f86ad98548059141279d153da370080767528)
    (#110) (h/t @nycex)

v1.8.2: Exeunt

Fixed:
  * Installing registry crates over git crates
    (72eb72039b0beb20687146e539bf5505a52eda46)
    (#103)

v1.8.1: Resequester

Fixed:
  * Building on 1.33
    (dd117faa8889b723bc48e38528fb42752d3b9c39)
    (#108)

Internal:
  * New patch to fix ssl/git2 builds on AppVeyor
    (918c49ad35e3cae25cd9844314715698d385fa38)

v1.8.0: Estus

Fixed:
  * Overriding registry packages with git ones with -i
    (8d758b004a44a87cb1e187a51e0855d2f62b7b7b)
    (#103)

New:
  * Detect and use proxy a la Cargo
    (385a6c351b13ec643d9f9d5aa09cdc2acfa2007d)
    (a2229dd02d9a5a43de34b97201cb31a948ebd028)
    (913fe6caa9775e8d841a76f5c46c8e17c9694cc3)
    (#106)
  * Authentication handling a la Cargo
    (82a6dca71935f138c7382c51c92b7bdf41543433)
    (#100)
  * Follow source URLs/replacements in Cargo config
    (f8e5ebd37c516157660d95c9a283dfc61c654535)
    (add8276d2cf06598a3a6fef6cc2a1fdb3a124443)
    (faf41393abcb5d5a46d42950971c03eed51805a8)
    (#107)

Changed:
  * RawGit links to GitHack
    (313fdaae09c90a16380e27feedba85355daef2bf)
  * Continue to git packages even if repository ones failed to build
    (c1c0ee0e4a03d624c90620b3afd6e07f57ad015c)
    (#102)
  * $CARGO_HOME/git/db/ for testing git packages, if present
    (cc540faf77cd170fe93c269a6f1554ac8f820302)
    (#66)

Internal
  * Reduced allocations/code size
    (1585f05cd426813b54c60225287ac888045b4bc2)
    (d45f252a30ad6d5ef58c2ae372aaba32742f5101)
  * Bumped dependencies. try{,_opt}! -> ?
    (baf2452ce74837959e7ae6bba46712ce7c17a81e)

v1.7.0: It's getting Stronger (feat. A-F-R-O)

Fixed:
  * Panic with nonexisting index directories
    (dd38cfed3e1fda7822d2a47e5701ecaa52ddbd41)
    (#98)

Changed:
  * Allow for specifying a packageset in addition to --all
    (1b0200f13ad2c79fc785c85da372e45aecab5de5)
    (38c65f7897fc9c8d6478ba735153c495a02eaebb)
    (28b298986853bec5c244fcfe8c5b06daa98adc94)
    (de29530d8bd610f9abd818833438b7979c83641f)
    (#94)
    (#96)

New:
  * Panic with unfound package name
    (3a7b72a643f59be050591eed73cf83f48153ada2)

v1.6.3

He lurks in the shadows, spying, looking, darting around for his prey…

v1.6.2: When you stare into the Void, a penguin stares back at you.

Fixed:
  * Installation on some systems
    (d286422487c9277b5df4a5e374f08c8bfedf58f3)
    (#90) (#92)

Changed:
  * Performance/idiomacity improvements
    (766527c79c752cdf9910027894865f6f4fa1aa1e)
    (#90)

v1.6.1: Testing, attention please!

Fix:
  * Empty filter list filtering out everything without a config
    (5aeee0fe5526418c2a9ff7a7377c824725cfc460)
    (#87)

v1.6.0

You know what they say: "the sweetest features come after one and a h…