[Ubuntu] Bionic updates

[Angelos Tzotsos]

Hi all,

I have pushed some updates to experimental ppa for testing.
The changes include:
* GDAL 2.4.0
* PostGIS 2.5.1
* MapServer 7.2.2
* OTB 6.6.1
* pgRouting 2.6.2
* Mapnik 3.0.22
* Fiona 1.8.4
* QGIS 2.18.28

Please test so we can move the packages to Unstable ppa soon.

Cheers,
Angelos


-- 
Angelos Tzotsos, PhD
Charter Member
Open Source Geospatial Foundation
http://users.ntua.gr/tzotsos