Update authors/acknowledgements [skip ci]

AUTHORS

@@ -7,6 +7,7 @@ Andreas Svensson <andreas@syranide.com>
 Andrew Davey <andrew@equin.co.uk>
 Andrew Zich <azich@fb.com>
 Andrey Popp <8mayday@gmail.com>
+Anthony van der Hoorn <anthony.vanderhoorn@gmail.com>
 Ayman Osman <aymano.osman@gmail.com>
 Ben Alpert <spicyjalapeno@gmail.com>
 Ben Newman <bn@cs.stanford.edu>
@@ -160,6 +161,7 @@ Sundeep Malladi <sundeep.malladi@gmail.com>
 Sven Helmberger <fforw@gmx.de>
 Thomas Aylott <oblivious@subtlegradient.com>
 Thomas Boyt <thomas.boyt@venmo.com>
+Thomas Shaddox <thomas@heyzap.com>
 Thomas Shafer <thomasjshafer@gmail.com>
 Timothy Yung <yungsters@gmail.com>
 Tom Haggie <thaggie@gmail.com>

docs/acknowledgements.md

@@ -17,6 +17,7 @@ We'd like to thank all of our contributors:
     <li>Andrew Davey</li>
     <li>Andrew Zich</li>
     <li>Andrey Popp</li>
+    <li>Anthony van der Hoorn</li>
     <li>Ayman Osman</li>
     <li>Ben Alpert</li>
     <li>Ben Newman</li>
@@ -174,6 +175,7 @@ We'd like to thank all of our contributors:
     <li>Sven Helmberger</li>
     <li>Thomas Aylott</li>
     <li>Thomas Boyt</li>
+    <li>Thomas Shaddox</li>
     <li>Thomas Shafer</li>
     <li>Timothy Yung</li>
     <li>Tom Haggie</li>