Update several null_value fixers to be explicit

Author: davidcelis

lib/block_kit/composition/option.rb

@@ -23,7 +23,7 @@ class Option < Base
       fixes :value, truncate: {maximum: MAX_VALUE_LENGTH, dangerous: true}
 
       validates :description, presence: true, length: {maximum: MAX_DESCRIPTION_LENGTH}, allow_nil: true
-      fixes :description, truncate: {maximum: MAX_DESCRIPTION_LENGTH}, null_value: [:blank]
+      fixes :description, truncate: {maximum: MAX_DESCRIPTION_LENGTH}, null_value: {error_types: [:blank]}
 
       def self.inherited(subclass)
         subclass.attribute_fixers = attribute_fixers.deep_dup

lib/block_kit/composition/overflow_option.rb

@@ -11,7 +11,7 @@ class OverflowOption < Option
 
       attribute :url, :string
       validates :url, presence: true, format: {with: URI::DEFAULT_PARSER.make_regexp, message: "is not a valid URI", allow_blank: true}, length: {maximum: MAX_URL_LENGTH}, allow_nil: true
-      fixes :url, truncate: {maximum: MAX_URL_LENGTH, dangerous: true, omission: ""}, null_value: [:blank]
+      fixes :url, truncate: {maximum: MAX_URL_LENGTH, dangerous: true, omission: ""}, null_value: {error_types: [:blank]}
 
       def as_json(*)
         super.merge(url: url).compact

lib/block_kit/composition/slack_file.rb

@@ -13,10 +13,10 @@ class SlackFile < Base
       attribute :url, :string
 
       validates :id, presence: true, format: {with: /\AF[A-Z0-9]{8,}\z/, allow_blank: true}, allow_nil: true
-      fixes :id, null_value: [:blank]
+      fixes :id, null_value: {error_types: [:blank]}
 
       validates :url, presence: true, length: {maximum: MAX_URL_LENGTH}, format: {with: URI::DEFAULT_PARSER.make_regexp(%w[http https]), message: "is not a valid URI", allow_blank: true}, allow_nil: true
-      fixes :url, null_value: [:blank]
+      fixes :url, null_value: {error_types: [:blank]}
 
       validate :id_or_url_present
 

lib/block_kit/composition/trigger.rb

@@ -14,7 +14,7 @@ class Trigger < Base
 
       validates :url, presence: true, length: {maximum: MAX_URL_LENGTH}, format: {with: URI::DEFAULT_PARSER.make_regexp(%w[http https]), message: "is not a valid URI", allow_blank: true}
       validates :customizable_input_parameters, presence: true, "block_kit/validators/associated": true, allow_nil: true
-      fixes :customizable_input_parameters, null_value: [:blank]
+      fixes :customizable_input_parameters, null_value: {error_types: [:blank]}
 
       dsl_method :customizable_input_parameters, as: :customizable_input_parameter, required_fields: [:name, :value], yields: false