[orca] Post-release version bump

[Joanmarie Diggs <joanied src gnome org>]

commit 4a1350b1fbd2b750040cc8bdba5ee7298a1994c5
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Aug 10 12:06:41 2020 +0200

    Post-release version bump

 README.md    | 2 +-
 configure.ac | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/README.md b/README.md
index 5c0b8804c..14c6e31d5 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Orca v3.37.90
+# Orca v3.37.91pre
 
 ## Introduction
 
diff --git a/configure.ac b/configure.ac
index eae099755..bdfde6af0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 m4_define([orca_major_version], [3])
 m4_define([orca_minor_version], [37])
-m4_define([orca_micro_version], [90])
+m4_define([orca_micro_version], [91pre])
 m4_define([orca_version],
           [orca_major_version.orca_minor_version.orca_micro_version])