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

@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.6'
 # Use sqlite3 as the database for Active Record
 gem "sqlite3", "~> 1.3.0"
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets

Gemfile.lock

@@ -241,6 +241,7 @@ GEM
       archive-zip (~> 0.10)
       nokogiri (~> 1.8)
     clipboard-rails (1.7.1)
+    coderay (1.1.3)
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
     coffee-rails (4.2.2)
@@ -608,9 +609,9 @@ GEM
     kaminari-core (1.2.2)
     kaminari_route_prefix (0.1.1)
       kaminari (~> 1.0)
+    language_list (1.2.1)
     launchy (2.5.0)
       addressable (~> 2.7)
-    language_list (1.2.1)
     ld-patch (3.2.0)
       ebnf (~> 2.2)
       rdf (~> 3.2)
@@ -749,7 +750,8 @@ GEM
     posix-spawn (0.3.15)
     power_converter (0.1.2)
     public_suffix (4.0.6)
-    puma (3.12.6)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     qa (5.8.1)
       activerecord-import
       deprecation
@@ -1127,7 +1129,7 @@ DEPENDENCIES
   orcid!
   pdfjs_viewer-rails!
   pg
-  puma (~> 3.11)
+  puma (~> 4.3)
   rack-attack
   rails (~> 5.2.6)
   redis (~> 4.0)