locking in package dependencies

requirements.txt

@@ -1,19 +1,19 @@
 pandas==2.2.2
-leafmap[maplibre]
-ibis-framework[duckdb]
+leafmap[maplibre]==0.38.12
+ibis-framework[duckdb]==9.5.0
 streamlit==1.37.0
 streamlit_folium==0.20.0
 altair==5.3.0
 referencing==0.35.1
 rasterio==1.3.10
 shapely==2.0.4
 shiny==0.10.2
-geoarrow-types 
-geoarrow-pandas
+geoarrow-types==0.2.0
+geoarrow-pandas==0.1.1
 leafmap==0.38.12 
 SQLAlchemy==2.0.35
-duckdb_engine
-langchain
-langchain-community
-langchain-core
-langchain-openai
+duckdb_engine==0.14.2
+langchain==0.2.17
+langchain-community==0.2.19
+langchain-core==0.2.43
+langchain-openai==0.1.25