[evolution/gnome-3-28] Update version requirements in flatpak files

[Milan Crha <mcrha src gnome org>]

commit b8bddf406294f9ec1c09773a5aa08b4b994f2e24
Author: Milan Crha <mcrha redhat com>
Date:   Tue Mar 20 13:39:01 2018 +0100

    Update version requirements in flatpak files

 flatpak/README                          |   10 ++++++++--
 flatpak/org.gnome.Evolution-master.json |    2 +-
 2 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/flatpak/README b/flatpak/README
index 2ab249c..d50c025 100644
--- a/flatpak/README
+++ b/flatpak/README
@@ -8,11 +8,17 @@ To build it, one can follow the below commands, which expect flatpak and
 flatpak-builder installed. Refer to the Flatpak developer documentation
 and command man pages for the meaning of respective arguments.
 
+Note the actual versions of the GNOME SDK and Platform (below is used
+version 3.26) can differ each release of Evolution. The exact expected
+version can be seen (or changed) in the .json file, the runtime-version
+key (line "runtime-version": "3.26",). Use the same version in the below
+install commands as is written in the runtime-version key of the .json file.
+
 To prepare Flatpak, add GNOME repository and install the SDK and Platform:
 
    $ flatpak remote-add --from gnome https://sdk.gnome.org/gnome.flatpakrepo
-   $ flatpak install gnome org.gnome.Platform//3.24
-   $ flatpak install gnome org.gnome.Sdk//3.24
+   $ flatpak install gnome org.gnome.Platform//3.26
+   $ flatpak install gnome org.gnome.Sdk//3.26
 
 After this, Evolution can be built. While the below commands build the git master
 version of Evolution, it can be changed to the stable version, when all "-master"
diff --git a/flatpak/org.gnome.Evolution-master.json b/flatpak/org.gnome.Evolution-master.json
index e81906d..47ba467 100644
--- a/flatpak/org.gnome.Evolution-master.json
+++ b/flatpak/org.gnome.Evolution-master.json
@@ -1,7 +1,7 @@
 {
        "app-id": "org.gnome.Evolution",
        "runtime": "org.gnome.Platform",
-       "runtime-version": "3.24",
+       "runtime-version": "3.26",
        "sdk": "org.gnome.Sdk",
        "command": "evolution",
        "rename-icon": "evolution",