Update various community docs

README.md

@@ -205,9 +205,11 @@ Refer to [this issue](https://github.com/prettier/plugin-ruby/issues/113#issueco
 
 ## Contributing
 
-Check out our [contributing guide](CONTRIBUTING.md). Bug reports and pull requests are welcome on GitHub at https://github.com/prettier/plugin-ruby.
+Thanks so much for your interest in contributing! You can contribute in many ways, including:
 
-You can support `prettier/plugin-ruby` [on OpenCollective](https://opencollective.com/prettier-ruby/contribute). Your organization's logo will show up here with a link to your website.
+* Contributing code to fix any bugs on [GitHub](https://github.com/prettier/plugin-ruby).
+* Reporting issues on [GitHub](https://github.com/prettier/plugin-ruby/issues/new).
+* Supporting `prettier/plugin-ruby` on [OpenCollective](https://opencollective.com/prettier-ruby/contribute). Your organization's logo will show up here with a link to your website.
 
 <!-- prettier-ignore-start -->
 <!-- markdownlint-disable -->

prettier.gemspec

@@ -5,12 +5,12 @@ package = JSON.parse(File.read(File.join(__dir__, "package.json")))
 
 Gem::Specification.new do |spec|
   spec.name = "prettier"
-  spec.version = package["version"]
-  spec.authors = [package["author"]]
+  spec.version = package.fetch("version")
+  spec.authors = [package.fetch("author")]
 
-  spec.summary = package["description"]
-  spec.homepage = package["homepage"]
-  spec.license = package["license"]
+  spec.summary = package.fetch("description")
+  spec.homepage = package.fetch("homepage")
+  spec.license = package.fetch("license")
 
   spec.files =
     Dir.chdir(__dir__) do