CHANGELOG.md in unicode-emoji-3.8.0 vs CHANGELOG.md in unicode-emoji-4.0.0

@@ -1,6 +1,19 @@
 # CHANGELOG
 
+### 4.0.0
+
+- **Breaking change:** Regexes now include single skin tone modifiers (`🏻`) and hair components (`🦰`).
+  They were previously considered to be invalid partial Emoji, however since they are supposed to be
+  displayed as Emoji in isolation, they are now part of the regexes (see *ED-20* in UTS51).
+- **Breaking change:** Drop `REGEX_ANY` in favor of `REGEX_PROP_EMOJI`
+- Expose regexes for Emoji props (`REGEX_PROP_*`). The advantage over using the native regex properties
+  directly is that you will be able to use the Emoji support level of this gem instead of Ruby's.
+  For example, as of releasing this, the current Emoji version is 16.0, while Ruby is at 15.0.
+  Also see README for a table listing the regexes that match Emoji properties.
+- Add `REGEX_EMOJI_KEYCAP` for matching specifically Emoji keycaps
+- Use character class instead of lookbehind for native text emoji and non-emoji pictographic regexes
+
 ### 3.8.0
 
 - Add new RGI-based regexes `REGEX_INCLUDE_MQE` and `REGEX_INCLUDE_MQE_UQE` which allows to match
   for minimally-qualified and unqualified RGI sequences (Emoji that lack some VS16)
 - Add specs running through `emoji-text.txt` and classify qualification statuses per regex