r-curl: add 3.3 (#11456)

var/spack/repos/builtin/packages/r-curl/package.py

@@ -21,6 +21,7 @@ class RCurl(RPackage):
     url      = "https://cran.r-project.org/src/contrib/curl_2.3.tar.gz"
     list_url = "https://cran.r-project.org/src/contrib/Archive/curl"
 
+    version('3.3', sha256='0cb0b9a9280edc42ebed94708541ec86b4f48779e722171e45227eab8a88a5bd')
     version('3.0', '741202626eacd1f9c022b0a4d7be6d6a')
     version('2.3',   '7250ee8caed98ba76906ab4d32da60f8')
     version('1.0',   '93d34926d6071e1fba7e728b482f0dd9')