Change default hide_nonpublic mapping

doc/tagbar.txt

@@ -331,7 +331,7 @@ P             Open the tag in a |preview-window|.
 <Space>       Display the prototype of the current tag (i.e. the line defining
               it) in the command line.
                 Map option: tagbar_map_showproto
-h             Hide tags that are declared non-public. Tags without any
+v             Hide tags that are declared non-public. Tags without any
               visibility information will still be shown.
                 Map option: tagbar_map_hidenonpublic
 +/zo          Open the fold under the cursor.

plugin/tagbar.vim

@@ -90,7 +90,7 @@ let s:keymaps = [
     \ ['nexttag',       '<C-N>'],
     \ ['prevtag',       '<C-P>'],
     \ ['showproto',     '<Space>'],
-    \ ['hidenonpublic', 'h'],
+    \ ['hidenonpublic', 'v'],
     \
     \ ['openfold',      ['+', '<kPlus>', 'zo']],
     \ ['closefold',     ['-', '<kMinus>', 'zc']],