<!--- Verify first that your issue is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Explain the problem briefly below -->
We publish semver collection (vyos.vyos:0.0.1-dev58) to ansible galaxy, however by default it seems ansible-galaxy client will not be able to find it. You must specific the version number directly to fetch it.

https://galaxy.ansible.com/vyos/vyos


EDIT:

This is working as expect, but it would be nice to Include:

   --pre                       Include pre-release and development versions. By default, ansible-galaxy only finds stable versions.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ansible-galaxy

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.9.1
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below

```


##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->

<!--- Paste example playbooks or commands between quotes below -->
```yaml
$ ansible-galaxy collection install vyos.vyos -p /tmp/11123
[WARNING]: The specified collections path '/tmp/11123' is not part of the configured Ansible collections paths '/home/pabelanger/.ansible/collections:/usr/share/ansible/collections'. The
installed collection won't be picked up in an Ansible run.

Process install dependency map
ERROR! Cannot meet requirement * for dependency vyos.vyos from source 'https://galaxy.ansible.com/api/'. Available versions before last requirement added: 
Requirements from:
	base - 'vyos.vyos:*'
(venv) [pabelanger@localhost openstack]$ ansible-galaxy collection install vyos.vyos:0.0.1-dev57 -p /tmp/11123
[WARNING]: The specified collections path '/tmp/11123' is not part of the configured Ansible collections paths '/home/pabelanger/.ansible/collections:/usr/share/ansible/collections'. The
installed collection won't be picked up in an Ansible run.

Process install dependency map
Starting collection install process
Installing 'vyos.vyos:0.0.1-dev57' to '/tmp/11123/ansible_collections/vyos/vyos'
```

<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
vyos.vyos collection to be found and installed

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->

<!--- Paste verbatim command output between quotes -->
```paste below

```

collection_path, collection_tar = collection_artifact
    temp_path = os.path.split(collection_tar)[0]
    mock_display = MagicMock()
    monkeypatch.setattr(Display, 'display', mock_display)
    # If we don't delete collection_path it will think the original build skeleton is installed so we expect a skip
    collection.install_collections([(to_text(collection_tar), '*', None,)], to_text(temp_path),
                                   [u'https://galaxy.ansible.com'], True, False, False, False, False)
    assert os.path.isdir(collection_path)
    actual_files = os.listdir(collection_path)
    actual_files.sort()
    assert actual_files == [b'README.md', b'docs', b'galaxy.yml', b'playbooks', b'plugins', b'roles']
    # Filter out the progress cursor display calls.
    display_msgs = [m[1][0] for m in mock_display.mock_calls if 'newline' not in m[2] and len(m[1]) == 1]
    assert len(display_msgs) == 4
    # Msg1 is the warning about not MANIFEST.json, cannot really check message as it has line breaks which varies based
    # on the path size
    assert displcess install dependency map"
    assert display_msgs[2] == "Starting collection install process"
    assert display_msgs[3] == "Skipping 'ansible_namespace.collection' as it is already installed"
# Makes sure we don't get stuck in some recursive loop
@pytest.mark.parametrize('collection_artifact', [
    {'ansible_namespace.collection': '>=0.0.1'},
], indirect=True)
def test_install_collection_with_circular_dependency(collection_artifact, monkeypatch):