Release Checkpoint 1.0.0

This would ordinarily be something less than 1.0, but this is a new gem
by an old name. To reduce the chance of breaking anything, we're going
with a new major version.

checkpoint.gemspec

@@ -9,6 +9,7 @@ Gem::Specification.new do |spec|
   spec.version = Checkpoint::VERSION
   spec.authors = ["Noah Botimer"]
   spec.email   = ["botimer@umich.edu"]
+  spec.license = "BSD-3-Clause"
 
   spec.summary = <<~SUMMARY
     Checkpoint provides a model and infrastructure for policy-based authorization,
@@ -17,15 +18,6 @@ Gem::Specification.new do |spec|
 
   spec.homepage = "https://github.com/mlibrary/checkpoint"
 
-  # Prevent pushing this gem to RubyGems.org. To allow pushes either set the 'allowed_push_host'
-  # to allow pushing to a single host or delete this section to allow pushing to any host.
-  if spec.respond_to?(:metadata)
-    spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"
-  else
-    raise "RubyGems 2.0 or newer is required to protect against " \
-      "public gem pushes."
-  end
-
   spec.files = `git ls-files -z`.split("\x0").reject do |f|
     f.match(%r{^(test|spec|features)/})
   end

lib/checkpoint/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Checkpoint
-  VERSION = "0.1.0"
+  VERSION = "1.0.0"
 end