[ci] Bump Fedora version on GitLab CI

Author: D4N

.gitlab-ci.yml

@@ -32,12 +32,12 @@ stages:
   - deploy
 
 Fedora:
-  image: fedora:28
+  image: fedora:latest
   <<: *default_config
   <<: *distro_build
 
 Fedora_MinGW:
-  image: fedora:29
+  image: fedora:latest
   before_script:
     - dnf -y upgrade
     - dnf -y install mingw64-gcc-c++ mingw64-filesystem mingw64-expat mingw64-zlib cmake make
@@ -70,7 +70,7 @@ OpenSUSE:
   <<: *distro_build
 
 Install:
-  image: fedora:28
+  image: fedora:latest
   stage: deploy
   <<: *default_config
   script:
@@ -82,7 +82,7 @@ Install:
     - EXIV2_BINDIR=/usr/bin/ make tests
 
 pages:
-  image: fedora:28
+  image: fedora:latest
   stage: deploy
   <<: *default_config
   script: