Update batch_loader gem to v2.0.1

This fixes some Ruby 2.7 deprecation warnings and adds support for a
GraphQL interpreter:
https://github.com/exAspArk/batch-loader/compare/v1.4.0..v2.0.1

Gemfile

@@ -319,7 +319,7 @@ gem 'gettext_i18n_rails', '~> 1.8.0'
 gem 'gettext_i18n_rails_js', '~> 1.3'
 gem 'gettext', '~> 3.3', require: false, group: :development
 
-gem 'batch-loader', '~> 1.4.0'
+gem 'batch-loader', '~> 2.0.1'
 
 # Perf bar
 gem 'peek', '~> 1.1'

Gemfile.lock

@@ -127,7 +127,7 @@ GEM
       nokogiri (~> 1.11.0.rc2)
     babosa (1.0.2)
     base32 (0.3.2)
-    batch-loader (1.4.0)
+    batch-loader (2.0.1)
     bcrypt (3.1.12)
     bcrypt_pbkdf (1.0.0)
     benchmark-ips (2.3.0)
@@ -1302,7 +1302,7 @@ DEPENDENCIES
   aws-sdk-s3 (~> 1)
   babosa (~> 1.0.2)
   base32 (~> 0.3.0)
-  batch-loader (~> 1.4.0)
+  batch-loader (~> 2.0.1)
   bcrypt (= 3.1.12)
   bcrypt_pbkdf (~> 1.0)
   benchmark-ips (~> 2.3.0)

changelogs/unreleased/sh-update-batchloader-2-0-0.yml

+---
+title: Update batch_loader gem to v2.0.0
+merge_request: 54639
+author:
+type: fixed