CIs: Build all branches

This will sadly trigger double build for travis due to lack of https://github.com/travis-ci/travis-ci/issues/6612 but overall it'll be useful for PRs targetting non-master branch.

.travis.yml

@@ -6,12 +6,6 @@ solution: ArchiSteamFarm.sln
 git:
   depth: 10
 
-# Don't build other branches than master
-# Sadly Travis doesn't support AppVeyor's "skip_branch_with_pr"
-branches:
-  only:
-    - master
-
 # Use latest images for building
 group: travis_latest
 

appveyor.yml

@@ -1,9 +1,6 @@
 version: '{build}-{branch}'
 pull_requests:
   do_not_increment_build_number: true
-branches:
-  only:
-  - master
 skip_branch_with_pr: true
 image:
 - Visual Studio 2017