Appveyor CI fixes (#876)

* Update boost path in appveyor CI

* Additional appveyor fixes for CI

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Co-authored-by: stephematician <steph.fn.contact@proton.me>

Author: AzothAmmo

appveyor.yml

@@ -24,10 +24,10 @@ environment:
       BOOST_ROOT: C:\Libraries\boost_1_66_0
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
       VS_VERSION_MAJOR: 16
-      BOOST_ROOT: C:\Libraries\boost_1_73_0
+      BOOST_ROOT: C:\Libraries\boost_1_85_0
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
       VS_VERSION_MAJOR: 17
-      BOOST_ROOT: C:\Libraries\boost_1_73_0
+      BOOST_ROOT: C:\Libraries\boost_1_85_0
 
 matrix:
   exclude: