[postgis-tickets] [PostGIS] #3953: [travis] enable coverage reports and caching

[PostGIS]

#3953: [travis] enable coverage reports and caching
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 Reporter:  komzpa     |      Owner:  komzpa
     Type:  defect     |     Status:  assigned
 Priority:  medium     |  Milestone:  PostGIS 2.5.0
Component:  buildbots  |    Version:  trunk
 Keywords:             |
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 codecov can report test coverage to all pull requests.

 Pull request:
 https://github.com/postgis/postgis/pull/158/

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3953>
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