[Ubuntu] Bionic updates

[Angelos Tzotsos]

Hi all,

I have pushed some updates to experimental ppa for testing.
The changes include:
* PROJ 5.2.0
* GEOS 3.7.0
* GDAL 2.3.2
* PostGIS 2.5.0 (with sfcgal support)
* OSSIM 2.5.2
* MapServer 7.2.1
* OTB 6.6.0
* pgRouting 2.6.1
* Mapnik 3.0.21
* MapProxy 1.11.0
* Fiona 1.8.1
* Rasterio 1.0.10
* QGIS 2.18.25
* Saga 2.3.1

This is a call for testing so we can move the packages to Unstable ppa 
soon :)
Big thanks to the DebianGIS team for their help with the packages.

Cheers,
Angelos


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