Revert "Trying to make work ruby with the CI."

This reverts commit 4f7da25.

Author: viferga

docs/README.md

@@ -105,7 +105,7 @@ This section describes all programming languages that **METACALL** allows to loa
 | [TypeScript](https://www.typescriptlang.org/)                      | [TypeScript Language Service API](https://github.com/microsoft/TypeScript/wiki/Using-the-Language-Service-API)                                        |                **4.2.3**                |  ts  |
 | [JavaScript](https://developer.mozilla.org/bm/docs/Web/JavaScript) | [V8](https://v8.dev/)                                                                                                                                 |               **5.1.117**               |  js  |
 | [C#](https://dotnet.microsoft.com/)                                | [NetCore](https://github.com/dotnet/docs/blob/master/docs/core/tutorials/netcore-hosting.md)                                                          |     **>= 1.0.0-preview2 <= 5.0.17**     |  cs  |
-| [Ruby](https://ruby-lang.org/)                                     | [Ruby C API](https://silverhammermba.github.io/emberb/c/)                                                                                             |            **>= 2.1 <= 3.0**            |  rb  |
+| [Ruby](https://ruby-lang.org/)                                     | [Ruby C API](https://silverhammermba.github.io/emberb/c/)                                                                                             |            **>= 2.1 <= 2.7**            |  rb  |
 | [Cobol](https://sourceforge.net/projects/open-cobol/)              | [GNU/Cobol](https://open-cobol.sourceforge.io/doxygen/gnucobol-2/libcob_8h.html)                                                                      |              **>= 1.1.0**               | cob  |
 | [File](/source/loaders/file_loader)                                | **∅**                                                                                                                                                 |                **0.1.0**                | file |
 | [Mock](/source/loaders/mock_loader)                                | **∅**                                                                                                                                                 |                **0.1.0**                | mock |

tools/metacall-environment.sh

@@ -125,7 +125,7 @@ sub_ruby(){
 	cd $ROOT_DIR
 
 	$SUDO_CMD apt-get update
-	$SUDO_CMD apt-get $APT_CACHE_CMD install -y --no-install-recommends ruby ruby-dev
+	$SUDO_CMD apt-get $APT_CACHE_CMD install -y --no-install-recommends ruby2.7 ruby2.7-dev
 
 	# TODO: Review conflict with NodeJS (currently rails test is disabled)
 	#wget https://deb.nodesource.com/setup_4.x | $SUDO_CMD bash -

tools/metacall-runtime.sh

@@ -86,7 +86,7 @@ sub_ruby(){
 	cd $ROOT_DIR
 
 	$SUDO_CMD apt-get update
-	sub_apt_install_hold ruby libruby
+	sub_apt_install_hold ruby2.7 libruby2.7
 }
 
 # NetCore