Prepare release 0.18.0 (#1281)

# Description
Prepare 0.18.0 release. I took the liberty of slightly improving the
cleanup example in the user guide, before it is pushed to the online
documentation.

I modified:
- select the last image as thumbnail
- Add titles to last plots

# Checklist
<!---
Before requesting review, please go through this checklist:
-->

- [ ] Links to correct issue
- [x] Update changelog, if changes affect users
- [ ] PR title starts with ``Issue #nr``, e.g. ``Issue #737``
- [ ] Unit tests were added
- [x] **If feature added**: Added/extended example

Author: JoerivanEngelen

docs/api/changelog.rst

@@ -7,8 +7,8 @@ The format is based on `Keep a Changelog`_, and this project adheres to
 `Semantic Versioning`_.
 
 
-[Unreleased]
-------------
+[0.18.0]
+--------
 
 Fixed
 ~~~~~

examples/user-guide/10-cleanup.py

@@ -8,6 +8,8 @@
 datasets.
 """
 
+# sphinx_gallery_thumbnail_number = -1
+
 # %%
 # We'll start with the usual imports
 import numpy as np
@@ -169,9 +171,10 @@
 
 diff_stage = dirty_ds["stage"] - cleaned_ds["stage"]
 
-imod.visualize.plot_map(
+fig, ax = imod.visualize.plot_map(
     diff_stage.max(dim="layer"), "viridis", np.linspace(0, max_diff, 9)
 )
+ax.set_title("stage lowered by cleanup (m)")
 
 # %%
 #
@@ -182,9 +185,11 @@
 
 diff_riv_bot = dirty_ds["bottom_elevation"] - cleaned_ds["bottom_elevation"]
 
-imod.visualize.plot_map(
+fig, ax = imod.visualize.plot_map(
     diff_riv_bot.max(dim="layer"), "viridis", np.linspace(0, max_diff, 9)
 )
+ax.set_title("river bottom lowered by cleanup (m)")
+
 # %%
 #
 # You can see the bottom elevation was lowered by the cleanup method.

imod/__init__.py

@@ -15,4 +15,4 @@
 )
 from imod.formats import gen, idf, ipf, prj, rasterio
 
-__version__ = "0.17.2"
+__version__ = "0.18.0"

pixi.toml

@@ -1,6 +1,6 @@
 [project]
 name = "imod-python"
-version = "0.17.2"
+version = "0.18.0"
 description = "Make massive MODFLOW models"
 authors = ["Deltares <huite.bootsma@deltares.nl>", ]
 channels = ["conda-forge", ]