Version 1.1.3 (#158)

* Require Elixir 1.9+

* Update changelog

* Bump tzdata ETS file

* Bump deps in mix.lock

* Version change to 1.1.3 in mix.exs

* Update readme to reflect v1.1.3

Version 1.1.2

Update CHANGELOG before 1.1.1 release

Merge pull request #118 from lau/v-1-1

v1.1.0 release

Merge pull request #112 from lau/update-105

Bump to v1.0.5

Update changelog to reflect 2019c release in version 1.0.3

Update ex_doc and earmark versions in mix.lock

Bump version to 0.5.22

Bump version to 1.0.1

Bump version to 0.5.21