Add support for Ruby 3.1

.github/workflows/ruby.yml

@@ -13,6 +13,7 @@ jobs:
           - '2.6'
           - '2.7'
           - '3.0'
+          - '3.1'
 
     steps:
       - uses: actions/checkout@v2

.tool-versions

@@ -1 +1 @@
-ruby 3.0.0
+ruby 3.1.0

Gemfile.lock

@@ -10,12 +10,12 @@ GEM
     climate_control (1.0.0)
     diff-lcs (1.4.4)
     docile (1.3.5)
-    parallel (1.20.1)
-    parser (3.0.1.0)
+    parallel (1.21.0)
+    parser (3.0.3.2)
       ast (~> 2.4.1)
     rainbow (3.0.0)
     rake (13.0.3)
-    regexp_parser (2.1.1)
+    regexp_parser (2.2.0)
     rexml (3.2.5)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
@@ -30,17 +30,17 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.2)
-    rubocop (1.13.0)
+    rubocop (1.24.0)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml
-      rubocop-ast (>= 1.2.0, < 2.0)
+      rubocop-ast (>= 1.15.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.4.1)
-      parser (>= 2.7.1.5)
+    rubocop-ast (1.15.0)
+      parser (>= 3.0.1.1)
     rubocop-rspec (2.3.0)
       rubocop (~> 1.0)
       rubocop-ast (>= 1.1.0)
@@ -51,7 +51,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.2)
-    unicode-display_width (2.0.0)
+    unicode-display_width (2.1.0)
 
 PLATFORMS
   x86_64-darwin-19
@@ -68,4 +68,4 @@ DEPENDENCIES
   simplecov
 
 BUNDLED WITH
-   2.2.13
+   2.3.3

lib/conifer/file.rb

@@ -26,7 +26,7 @@ def [](key)
     def parsed
       @parsed ||= case format
                   when :yml, :yaml
-                    YAML.safe_load(ERB.new(::File.read(path)).result, allowed_classes)
+                    YAML.safe_load(ERB.new(::File.read(path)).result, permitted_classes: allowed_classes)
                   when :json
                     JSON.parse(ERB.new(::File.read(path)).result)
                   else