[Swift5] Can't use templates

Description

There is the error FileNotFoundException when I use -t parameter for language Swift5

command line log:

at io.swagger.codegen.v3.DefaultGenerator.generateModels(DefaultGenerator.java:451)
at io.swagger.codegen.v3.DefaultGenerator.generate(DefaultGenerator.java:779)
at io.swagger.codegen.v3.cli.cmd.Generate.run(Generate.java:369)
at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: java.io.FileNotFoundException: handlebars/swift5/model.mustache
at com.github.jknack.handlebars.io.URLTemplateLoader.sourceAt(URLTemplateLoader.java:70)
at com.github.jknack.handlebars.Handlebars.compile(Handlebars.java:438)
at com.github.jknack.handlebars.Handlebars.compile(Handlebars.java:419)
at io.swagger.codegen.v3.templates.HandlebarTemplateEngine.getHandlebars(HandlebarTemplateEngine.java:48)
at io.swagger.codegen.v3.templates.HandlebarTemplateEngine.getRendered(HandlebarTemplateEngine.java:24)
at io.swagger.codegen.v3.DefaultGenerator.processTemplateToFile(DefaultGenerator.java:795)
at io.swagger.codegen.v3.DefaultGenerator.generateModels(DefaultGenerator.java:438)
... 3 more

Swagger-codegen version

3.0.20

Swagger declaration file content or url

Command line used for generation

swagger-codegen generate -i PATH_TO_JSON -l swift5 -t PATH_TO_TEMPLATES -o OUTPUT_PATH

Steps to reproduce

Run the command above

Related issues/PRs

https://github.com/swagger-api/swagger-codegen/issues/10107

Suggest a fix/enhancement

https://github.com/swagger-api/swagger-codegen-generators/commit/1149e58bc6a54b54f3ac232a6f4e7e5ed5912f0b
Make similar changes to the swift5 codegen file

Start by reproducing the provided swagger-codegen generate command with the Swift5 language and inspect the missing handlebars/swift5/model.mustache path. Compare the Swift5 codegen templates with the changes in the referenced commit and review related issue #10107. Done means Swift5 model generation completes without the FileNotFoundException.