ENH bump the appveyor image

conda_smithy/configure_feedstock.py

@@ -1060,6 +1060,7 @@ def _appveyor_specific_setup(jinja_env, forge_config, forge_dir, platform):
     build_setup = new_build_setup.strip()
 
     forge_config["build_setup"] = build_setup
+    forge_config["appveyor"] = {"image": "Visual Studio 2017"}
 
 
 def render_appveyor(jinja_env, forge_config, forge_dir, return_metadata=False):
@@ -1634,19 +1635,19 @@ def set_migration_fns(forge_dir, forge_config):
     """
     This will calculate the migration files and set migration_fns
     in the forge_config as a list.
-    
+
     First, this will look in the conda-forge-pinning (CFP) package
     to see if it has migrations installed. If not, the filenames of
     the migrations the feedstock are used.
-    
+
     Then, this will look at migrations in the feedstock and if they
     have a timestamp and doesn't exist in the CFP package, the
     migration is considered old and deleted.
-    
+
     Then, if there is a migration in the feedstock with the same
     migration number and timestamp in the CFP package, the filename of
     the migration in the CFP package is used.
-    
+
     Finally, if none of the conditions are met for a migration in the
     feedstock, the filename of the migration in the feedstock is used.
     """

news/appveyor.rst

@@ -0,0 +1,3 @@
+**Changed:**
+
+* Moved the appveyor image to Visual Studio 2017.