Thanks for the great library and your support!

Describe the bug
Using hierarchy in .secrets.toml overwrites settings in settings.toml.

To Reproduce
Steps to reproduce the behavior:

1. Having the following folder structure

files/testing/settings.toml
files/testing/.secrets.toml
src/main.py

2. Having the following config files:

[default]
[default.db]
    name="name_default"

[default]
[default.db]
    password = 'default_password'

3. Having the following app code:

from dynaconf import LazySettings

settings = LazySettings(
    environments=True,
    ENV_FOR_DYNACONF="default",
    ENVVAR_PREFIX_FOR_DYNACONF="none",
    load_dotenv=True,
    settings_files="../files/testing/settings.toml;../files/testing/.secrets.toml",
)

print(settings.db)

4. Executing under the following environment

$ python3 ./src/main.py

Actual behavior
Print: {'password': 'default_password'}

Expected behavior
Print: {'name': 'name_default', 'password': 'default_password'}

Environment (please complete the following information):

• OS: Linux 10 (buster)
• Python: 3.9.1
• Dynaconf Version: 3.1.5
• Frameworks in use: none

Additional context
Removing hierarchy from .secrets.toml results in expected behavior:

Changing
files/testing/.secrets.toml

[default]
password = 'default_password'

and

/src/main.py

from dynaconf import LazySettings

settings = LazySettings(
    environments=True,
    ENV_FOR_DYNACONF="default",
    ENVVAR_PREFIX_FOR_DYNACONF="none",
    load_dotenv=True,
    settings_files="../files/testing/settings.toml;../files/testing/.secrets.toml",
)

print(settings.db)
print(settings.password)

Results in the following output:

{'name': 'name_default'}
default_password