Downgrade sprockets to 3.7.2

This fixes a segmentation error in circle ci after upgrading to rails 6
this is when the docker file runs assets:precompile
sass/sassc-rails#122
The error can be found above

.circleci/config.yml

@@ -3,7 +3,7 @@ version: 2.0
 references:
   build_container_config: &build_container_config
     docker:
-    - image: circleci/ruby:2.6.5-node-browsers
+    - image: circleci/ruby:2.6.3-node-browsers
       environment:
         GITHUB_TEAM_NAME_SLUG: laa-apply-for-legal-aid
     - image: circleci/postgres:10.5

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.6.5-alpine3.10
+FROM ruby:2.6.3-alpine3.10
 MAINTAINER apply for legal aid team
 
 ENV \

Gemfile

@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby '2.6.5'
+ruby '2.6.3'
 
 gem 'aasm', '~> 5.0.6'
 gem 'active_model_serializers', '~> 0.10.10'
@@ -57,7 +57,8 @@ gem 'sidekiq-status'
 gem 'sidekiq_alive'
 
 # Transformer that converts ES6 code into vanilla ES5 using babel via asset pipeline
-gem 'sprockets', '>= 3.0.0'
+# Default to 3.7.2 as https://github.com/sass/sassc-rails/issues/122 sassc loading is causing a segmentation error
+gem 'sprockets', '3.7.2'
 gem 'sprockets-es6'
 
 # URL and path parsing

Gemfile.lock

@@ -138,7 +138,7 @@ GEM
       numerizer (~> 0.1.1)
     climate_control (0.2.0)
     coderay (1.1.2)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.6)
     connection_pool (2.2.2)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -330,7 +330,7 @@ GEM
       nio4r (~> 2.0)
     pundit (2.1.0)
       activesupport (>= 3.0.0)
-    rack (2.1.2)
+    rack (2.2.2)
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)
       rack (>= 1.1)
@@ -484,7 +484,7 @@ GEM
     spring-watcher-listen (2.0.1)
       listen (>= 2.7, < 4.0)
       spring (>= 1.2, < 3.0)
-    sprockets (4.0.0)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-es6 (0.9.2)
@@ -604,7 +604,7 @@ DEPENDENCIES
   slack-notifier
   spring
   spring-watcher-listen (~> 2.0.0)
-  sprockets (>= 3.0.0)
+  sprockets (= 3.7.2)
   sprockets-es6
   timecop
   tzinfo-data
@@ -616,7 +616,7 @@ DEPENDENCIES
   wicked_pdf
 
 RUBY VERSION
-   ruby 2.6.5p114
+   ruby 2.6.3p62
 
 BUNDLED WITH
    2.1.4