Bump puma from 3.12.1 to 4.3.12

Bumps [puma](https://github.com/puma/puma) from 3.12.1 to 4.3.12.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v3.12.1...v4.3.12)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -11,7 +11,7 @@ group :production, :development, :test do
   # Use sqlite3 as the database for Active Record
   gem 'sqlite3', '~> 1.3.13'
   # Use Puma as the app server
-  gem 'puma', '~> 3.7'
+  gem 'puma', '~> 4.3'
   # Use SCSS for stylesheets
   gem 'sass-rails', '~> 5.0'
   # Use Uglifier as compressor for JavaScript assets

Gemfile.lock

@@ -647,7 +647,8 @@ GEM
     powerpack (0.1.2)
     public_suffix (3.0.3)
     pul_uv_rails (2.0.1)
-    puma (3.12.1)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     qa (2.2.0)
       activerecord-import
       deprecation
@@ -989,7 +990,7 @@ DEPENDENCIES
   omniauth-saml
   orcid!
   pdfjs_viewer-rails!
-  puma (~> 3.7)
+  puma (~> 4.3)
   rack-attack
   rails (~> 5.1.6.1)
   redis (~> 4.0)