Update tests and increase timeout

Author: jemelyah

.github/workflows/tests.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     env:
       FERRUM_PROCESS_TIMEOUT: 25
-      FERRUM_DEFAULT_TIMEOUT: 15
+      FERRUM_DEFAULT_TIMEOUT: 25
       BUNDLE_GEMFILE: .github/gemfiles/${{ matrix.gemfile }}.gemfile
     steps:
       - name: Checkout code

spec/unit/process_spec.rb

@@ -3,7 +3,7 @@
 describe Ferrum::Browser::Process do
   subject { Ferrum::Browser.new(port: 6000, host: "127.0.0.1") }
 
-  unless Ferrum::Utils::Platform.windows?
+  unless Ferrum::Utils::Platform.windows? && !Ferrum::Utils::Platform.jruby?
     it "forcibly kills the child if it does not respond to SIGTERM" do
       allow(Process).to receive(:spawn).and_return(5678)
       allow(Process).to receive(:wait).and_return(nil)