Change log entry for v1.4 and removed some old TODOs

TODO

@@ -4,12 +4,9 @@ MAYBE:
     - Separate syntax group for heading delimiters
     - Syntax highlight and indent "properties"
   - Inline blocks
+    - Try to get text attributes to stack (e.g. underlined text in bold text)
     - Close inline block using same number of starting delimiters.
     - Set a max number of lines to search for end delimiter for bold/italic/etc. to 3 (might not be possible)
-  - TeX:
-    - Hightlight concealed TeX the same as normal text
-    - Try to get text attributes to stack (e.g. underlined text in bold text)
-      - TeX math fragments in bold, italic, etc. text
 
 UNLIKELY:
   - Implement Emacs's abbreviations (e.g. '\<s<TAB>')

doc/org.txt

@@ -130,6 +130,13 @@ To disable italics only in a single buffer, use this instead:
 ==============================================================================
  4. CHANGE LOG                                                  *org-changelog*
 
+v1.4 [2020-08-24]~
+
+  * Render "strikethrough" text as "struck through".
+  * Added syntax cluster groups for headings and hyperlinks.
+  * Made spacing consistent throughout syntax files.
+  * Minor wording tweaks to README.
+
 v1.3 [2020-05-02]~
 
   * Added syntax highlighting of LaTeX math fragments.  (Thanks Gavinok!)