update readme

we already say "warning" in bold and upper case — the warning emoji feels unnecessary

.travis.yml

@@ -1,23 +1,25 @@
 language: php
 
-dist: trusty
-sudo: false
-
 matrix:
   include:
     - php: 5.3
       dist: precise
     - php: 5.4
+      dist: trusty
     - php: 5.5
+      dist: trusty
     - php: 5.6
+      dist: xenial
     - php: 7.0
+      dist: xenial
     - php: 7.1
+      dist: bionic
     - php: 7.2
+      dist: bionic
     - php: 7.3
-    - php: nightly
-  fast_finish: true
-  allow_failures:
-    - php: nightly
+      dist: bionic
+    - php: 7.4
+      dist: bionic
 
 install:
   - composer install --prefer-dist --no-interaction --no-progress

README.md

@@ -17,7 +17,7 @@ Better Markdown Parser in PHP - <a href="http://parsedown.org/demo">Demo</a>.
 * No Dependencies
 * [Super Fast](http://parsedown.org/speed)
 * Extensible
-* [GitHub flavored](https://help.github.com/articles/github-flavored-markdown)
+* [GitHub flavored](https://github.github.com/gfm)
 * [Tested](http://parsedown.org/tests/) in 5.3 to 7.3
 * [Markdown Extra extension](https://github.com/erusev/parsedown-extra)
 
@@ -68,7 +68,7 @@ Safe mode does not necessarily yield safe results when using extensions to Parse
 
 ## Escaping HTML
 
-> ⚠️  **WARNING:** This method isn't safe from XSS!
+> **WARNING:** This method isn't safe from XSS!
 
 If you wish to escape HTML **in trusted input**, you can use the following:
 
@@ -97,3 +97,7 @@ It passes most of the CommonMark tests. Most of the tests that don't pass deal w
 **How can I help?**
 
 Use it, star it, share it and if you feel generous, [donate](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=528P3NZQMP8N2).
+
+**What else should I know?**
+
+I also make [Nota](https://nota.md/) — a writing app designed for Markdown files :)