Update rgeo-proj4 to version 5.0.0

Author: depfu[bot]

Gemfile.lock

@@ -444,12 +444,12 @@ GEM
     reline (0.6.3)
       io-console (~> 0.5)
     rexml (3.4.4)
-    rgeo (3.0.1)
+    rgeo (3.1.0)
     rgeo-geojson (2.2.0)
       multi_json (~> 1.15)
       rgeo (>= 1.0.0)
-    rgeo-proj4 (4.0.0)
-      rgeo (~> 3.0.0)
+    rgeo-proj4 (5.0.0)
+      rgeo (~> 3.1.0)
     rspec (3.13.2)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)