remove tests and tasks from release gems

Developers use the github repo to get full access to the development of this gem. The fixed (non git-ls-files) approach to packaging files has led to a 30mb gem recently, this will prevent that from happening again.

inspec.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
     README.md Rakefile MAINTAINERS.toml MAINTAINERS.md LICENSE inspec.gemspec
     Gemfile CHANGELOG.md .rubocop.yml
   } + Dir.glob(
-    '{bin,docs,examples,lib,tasks,test}/**/*', File::FNM_DOTMATCH
+    '{bin,docs,examples,lib}/**/*', File::FNM_DOTMATCH
   ).reject { |f| File.directory?(f) }
 
   spec.executables   = %w{ inspec }