Add changelog

CHANGELOG.md

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+# Change Log
+
+## v3.0 - 2022-12-01
+- migrate to manifest v3
+- add light icon option for dark browser theme
+
+## v2.0 - 2020-12-30
+- add copy file to clipboard as binary image
+
+## v1.9 - 2019-07-13
+- add copy file to clipboard as base64 string
+
+## v1.8 - 2018-10-11
+- migrate options page to mdc
+- update mithril
+
+## v1.7 - 2017-05-05
+- update z-index for the crop overlay
+- update options page
+
+## v1.6 - 2017-02-14
+- add support for window resize while the overlay is on
+
+## v1.5 - 2016-11-15
+- generate unique file name for every screenshot
+
+## v1.4 - 2016-11-12
+- add support for device pixel ratio
+
+## v1.3 - 2016-10-30
+- update options page using mdl and mithril
+- change button badge based on capture type being used
+- update jquery
+
+## v1.2 - 2016-07-02
+- update source code and project structure
+
+## v1.1 - 2015-12-31
+- fix z-index issue for the crop overlay
+
+## v1.0 - 2014-09-09
+- capture viewport
+- crop and save
+- crop and wait
+- initial Chrome release