Fixing specs on windows. (#1074)

* Fixing specs on windows. Fixes #1072

* bump the min crystal version to 1.11 to support EOL for Windows

* Reverting all of the changed files.

* hack to get windows to pass this spec

* I think this hack will allow the spec to remain as it was and still work on Windows

.gitattributes

@@ -0,0 +1 @@
+*.cr text eol=lf

spec/avram/migrator/gen/migration_spec.cr

@@ -31,7 +31,15 @@ describe "Generating migrations" do
         rollback_contents: rollback_contents
       ).generate(_version: "123")
 
-      File.read("./db/migrations/123_create_users.cr").should contain <<-MIGRATION
+      created_migration_file = File.read("./db/migrations/123_create_users.cr")
+
+      {% if flag?(:windows) %}
+        # NOTE: Reading from the file on windows returns \r\n, but this spec's line endings are still \n
+        # due to the .gitattributes file. Also note that `EOL` didn't exist until Crystal 1.11.0
+        created_migration_file = created_migration_file.gsub(EOL, "\n")
+      {% end %}
+
+      created_migration_file.should contain <<-MIGRATION
       class CreateUsers::V123 < Avram::Migrator::Migration::V1
         def migrate
           create :users do