[patch:ci] Change CI script to use implicit rspec call

.travis.yml

@@ -1,6 +1,6 @@
 language: ruby
 before_install: gem update --system
-script: bundle exec rake
+script: bundle exec rspec spec
 rvm:
   - 2.5
   - 2.6

Rakefile

@@ -1,6 +1 @@
-require "bundler/gem_tasks"
-require 'rspec/core/rake_task'
-task :default => [:spec]
-
-desc "Run the specs"
-RSpec::Core::RakeTask.new(:spec)
+require "bundler/gem_tasks"

lib/eucalypt/core/templates/eucalypt/.travis.yml

@@ -1,6 +1,6 @@
 language: ruby
 before_install: gem update --system
-script: bundle exec rake
+script: bundle exec rspec spec
 rvm: 2.5
 services:
   - postgresql

lib/eucalypt/core/templates/eucalypt/Rakefile

@@ -1,9 +1,2 @@
 require './app'
-
-begin
-  require 'rspec/core/rake_task'
-  task :default => [:spec]
-  desc "Run the specs"
-  RSpec::Core::RakeTask.new :spec
-rescue LoadError
-end
+# Add your Rake tasks here!