Bump to Python 3.14 and PyGMT v0.18.0

Author: seisman

README.md

@@ -19,8 +19,8 @@ Run it online by clicking on one of the badges below:
 - **GMT**: 6.6.0
 - **Julia**: 1.10
 - **GMT.jl**: 1.x
-- **Python**: 3.13
-- **PyGMT**: 0.17.0
+- **Python**: 3.14
+- **PyGMT**: 0.18.0
 - **Geopandas**: 1.1.1
 
 ## Reference

environment.yml

@@ -3,9 +3,9 @@ channels:
   - conda-forge
   - nodefaults
 dependencies:
-  - python=3.13
+  - python=3.14
   - gmt=6.6.0
-  - pygmt=0.17.0
+  - pygmt=0.18.0
   - jupyterlab=4.4.9
   - jupyter-offlinenotebook=0.3.2
   # Optional dependencies