lti13-0.1.2.0: CHANGELOG.md

# Revision history for lti13

## 0.1.0.0 -- 2020-08-13

* Unreleased

## 0.1.1.0 -- 2020-09-15

* Handle Canvas Cloud setting all their issuers the same.

## 0.1.2.0 -- 2020-09-16

* No changes