Standardize on Postgres 13

Postgres 11 is already EOL and Postgres 12 is about to be EOL so let's use Postgres 13 as the minimum Postgres version in the CI builds.

.github/workflows/ubuntu_build.yml

@@ -41,7 +41,7 @@ jobs:
           SA_PASSWORD: StrongPassword2022
 
       postgres:
-        image: postgres:11
+        image: postgres:13
         env:
           POSTGRES_DB: postgres_db
           POSTGRES_USER: postgres_user

appveyor/install.ps1

@@ -189,10 +189,10 @@ if ($python_arch -eq "64") {
     CheckAndInstallZippedMsiFromUrl `
         -driver_name "PostgreSQL Unicode(x64)" `
         -driver_bitness "64-bit" `
-        -driver_url "https://ftp.postgresql.org/pub/odbc/versions.old/msi/psqlodbc_11_01_0000-x64.zip" `
-        -zipfile_path "$temp_dir\psqlodbc_11_01_0000-x64.zip" `
+        -driver_url "https://ftp.postgresql.org/pub/odbc/versions.old/msi/psqlodbc_13_02_0000-x64-1.zip" `
+        -zipfile_path "$temp_dir\psqlodbc_13_02_0000-x64-1.zip" `
         -zip_internal_msi_file "psqlodbc_x64.msi" `
-        -msifile_path "$cache_dir\psqlodbc_11_01_0000-x64.msi";
+        -msifile_path "$cache_dir\psqlodbc_13_02_0000-x64.msi";
 
     CheckAndInstallMsiFromUrl `
         -driver_name "MySQL ODBC 8.4 ANSI Driver" `
@@ -205,10 +205,10 @@ if ($python_arch -eq "64") {
     CheckAndInstallZippedMsiFromUrl `
         -driver_name "PostgreSQL Unicode" `
         -driver_bitness "32-bit" `
-        -driver_url "https://ftp.postgresql.org/pub/odbc/versions.old/msi/psqlodbc_11_01_0000-x86.zip" `
-        -zipfile_path "$temp_dir\psqlodbc_11_01_0000-x86.zip" `
+        -driver_url "https://ftp.postgresql.org/pub/odbc/versions.old/msi/psqlodbc_13_02_0000-x86-1.zip" `
+        -zipfile_path "$temp_dir\psqlodbc_13_02_0000-x86-1.zip" `
         -zip_internal_msi_file "psqlodbc_x86.msi" `
-        -msifile_path "$cache_dir\psqlodbc_11_01_0000-x86.msi";
+        -msifile_path "$cache_dir\psqlodbc_13_02_0000-x86.msi";
 
     CheckAndInstallMsiFromUrl `
         -driver_name "MySQL ODBC 8.0 ANSI Driver" `