[sqlite3] fix from AR

Author: dr-itz

lib/arjdbc/sqlite3/adapter.rb

@@ -364,7 +364,8 @@ def table_structure(table_name)
     # See: https://www.sqlite.org/lang_altertable.html
     # SQLite has an additional restriction on the ALTER TABLE statement
     def invalid_alter_table_type?(type, options)
-      type.to_sym == :primary_key || options[:primary_key]
+      type.to_sym == :primary_key || options[:primary_key] ||
+        options[:null] == false && options[:default].nil?
     end
 
     def alter_table(table_name, foreign_keys = foreign_keys(table_name), **options)