Require TLS 1.2 to download curl

Author: DenverM80

win32/deps/build/download_and_unzip.ps1

@@ -1,6 +1,7 @@
 # download 32bit library dependencies and put into expected layout for install.
 
 . "$PSScriptRoot\util.ps1" # provides Unzip and Untar
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
 
 (new-object System.Net.WebClient).DownloadFile(
     'http://curl.haxx.se/download/curl-7.37.0.zip',

win32/deps/build/download_and_unzip_64.ps1

@@ -1,6 +1,7 @@
 # download 64bit library dependencies and put into expected layout for install.
 
 . "$PSScriptRoot\util.ps1" # provides Unzip and Untar
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
 
 (new-object System.Net.WebClient).DownloadFile('http://curl.haxx.se/download/curl-7.37.0.zip','curl-7.37.0.zip')
 Unzip curl-7.37.0.zip .