ClickForLatLng() is not implemented even if PR #1530
**Describe the bug**
The `folium.ClickForLatLng()` functionality seem to be missing.

**`AttributeError: module 'folium' has no attribute 'ClickForLatLng'. Did you mean: 'ClickForMarker'?`**


**To Reproduce**

```python
# ...
m = folium.Map(MC, zoom_start=15, max_zoom=21, control_scale=True, tiles='cartodb positron')
folium.ClickForLatLng().add_to(m)
```

**Expected behavior**
expect it to copy to clipboard

**Environment (please complete the following information):**
```powershell
# python.exe -c "import folium; print(folium.__version__)"
0.12.1.post1
# python.exe -c "import branca; print(branca.__version__)"
0.5.0
# python.exe -c "import sys; print(sys.version_info)"
sys.version_info(major=3, minor=10, micro=3, releaselevel='final', serial=0)
```

**Other**

Should be working from PR #1530.


diff --git a/folium/__init__.py b/folium/__init__.py
index acd6cc0..f416ef9 100644
--- a/folium/__init__.py
+++ b/folium/__init__.py
@@ -17,6 +17,7 @@ from branca.element import (
 from folium.features import (
     Choropleth,
     ClickForMarker,
+    ClickForLatLng,
     ColorLine,
     CustomIcon,
     DivIcon,
@@ -75,6 +76,7 @@ if sys.version_info < (3, 0):
 __all__ = [
     'Choropleth',
     'ClickForMarker',
+    'ClickForLatLng',
     'ColorLine',
     'ColorMap',
     'CssLink',
['folium/__init__.py']