chore: regens API reference docs (#889)

diff --git a/docs/epy/googleapiclient.errors-module.html b/docs/epy/googleapiclient.errors-module.html
index 5e9deab..cea6900 100644
--- a/docs/epy/googleapiclient.errors-module.html
+++ b/docs/epy/googleapiclient.errors-module.html
@@ -154,7 +154,7 @@
       <span class="summary-type">&nbsp;</span>
     </td><td class="summary">
         <a href="googleapiclient.errors.ResumableUploadError-class.html" class="summary-name">ResumableUploadError</a><br />
-      Error occured during resumable upload.
+      Error occurred during resumable upload.
     </td>
   </tr>
 <tr>
@@ -178,7 +178,7 @@
       <span class="summary-type">&nbsp;</span>
     </td><td class="summary">
         <a href="googleapiclient.errors.BatchError-class.html" class="summary-name">BatchError</a><br />
-      Error occured during batch operations.
+      Error occurred during batch operations.
     </td>
   </tr>
 <tr>
@@ -224,7 +224,7 @@
 <table border="0" cellpadding="0" cellspacing="0" width="100%%">
   <tr>
     <td align="left" class="footer">
-    Generated by Epydoc 3.0.1 on Fri Jun 14 15:57:27 2019
+    Generated by Epydoc 3.0.1 on Thu Apr 30 17:06:05 2020
     </td>
     <td align="right" class="footer">
       <a target="mainFrame" href="http://epydoc.sourceforge.net"