[pitivi] flatpak: Update matplotlib

[Thibault Saunier <tsaunier src gnome org>]

commit 938ec1c36dbf068b8f7ed6da78a9d7e2ea122b2f
Author: Thibault Saunier <tsaunier igalia com>
Date:   Sat Mar 9 09:20:38 2019 -0300

    flatpak: Update matplotlib

 build/flatpak/org.pitivi.Pitivi.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/build/flatpak/org.pitivi.Pitivi.json b/build/flatpak/org.pitivi.Pitivi.json
index 8dc838c7..14a827e7 100644
--- a/build/flatpak/org.pitivi.Pitivi.json
+++ b/build/flatpak/org.pitivi.Pitivi.json
@@ -164,8 +164,8 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": 
"https://files.pythonhosted.org/packages/eb/a0/31b6ba00bc4dcbc06f0b80d1ad6119a9cc3081ecb04a00117f6c1ca3a084/matplotlib-2.2.3.tar.gz";,
-                    "sha256": "7355bf757ecacd5f0ac9dd9523c8e1a1103faadf8d33c22664178e17533f8ce5"
+                    "url": 
"https://files.pythonhosted.org/packages/26/04/8b381d5b166508cc258632b225adbafec49bbe69aa9a4fa1f1b461428313/matplotlib-3.0.3.tar.gz";,
+                    "sha256": "e1d33589e32f482d0a7d1957bf473d43341115d40d33f578dad44432e47df7b7"
                 }
             ]
         },