Option to have strict Float field

Nobody has claimed this yet.

I [don't see](https://marshmallow.readthedocs.io/en/stable/api_reference.html) any kwarg to make Float field strict, similar to Int and Boolean fields:

```python
import pytest
from marshmallow import fields, Schema, ValidationError

class ParamsSchema(Schema):
integer = fields.Int(strict=True)
number = fields.Float() # need an option to make it strict
boolean = fields.Boolean(truthy=[True], falsy=[False])

@pytest.fixture
def schema():
return ParamsSchema()

def test_strict(schema):
schema.load({
'integer': 0,
'number': 3.142,
'boolean': True
})

def test_int_str(schema):
with pytest.raises(ValidationError):
schema.load({'integer': '0'})

def test_float_str(schema):
with pytest.raises(ValidationError):
schema.load({'number': '3.142'})

def test_boolean_str(schema):
with pytest.raises(ValidationError):
schema.load({'boolean': 'true'})
```

Is there plan to add that in in future? Or I have to create my own field class?

Start by reading the existing fields.Float implementation and the strict=True behavior of fields.Int. Use the examples in the issue as the behavioral cases, including rejecting a string for the Float field, and add tests alongside the existing field validation tests. Done means Float offers an equivalent strict option and the documented examples pass.

Written by the indexing model from the issue text.