feat: use go 1.12x

License: MIT
Signed-off-by: Henrique Dias <hacdias@gmail.com>

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Former-commit-id: 0669d58fb6dc75a63b6e16857d7a4e09a6ba806f [formerly f4d38b4fbf2a7aa234c1c7cacc743fc386f5fa20]
Former-commit-id: 8391f23eaa62ca9a4599c327b8418d9593ad110b

.travis.yml

@@ -1,6 +1,8 @@
 os: linux
 services: docker
-language: minimal
+language: go
+go:
+  - 1.12.x
 install: skip
 addons:
   apt:

wizard.sh

@@ -135,12 +135,7 @@ pushRicebox () {
   cp ../http/rice-box.go ./
   sed -i 's/package http/package caddy/g' ./rice-box.go
 
-  docker run --rm -t \
-    -v $(pwd):/src \
-    -w /src \
-    -v /var/run/docker.sock:/var/run/docker.sock \
-    filebrowser/dev \
-    sh -c "go get -u github.com/filebrowser/filebrowser/v2@latest"
+  go get -u github.com/filebrowser/filebrowser/v2@latest
 
   git checkout -b update-rice-box origin/master
   git config --local user.name "Filebrowser Bot"