curl: Update version from 7.63.0 to 7.64.0

From the [change-log][1]:

> Changes:
>
> *   cookies: leave secure cookies alone
> *   hostip: support wildcard hosts
> *   http: Implement trailing headers for chunked transfers
> *   http: added options for allowing HTTP/0.9 responses
> *   timeval: Use high resolution timestamps on Windows
>
> Bugfixes:
>
> *   CVE-2018-16890: NTLM type-2 out-of-bounds buffer read
> *   CVE-2019-3822: NTLMv2 type-3 header stack buffer overflow
> *   CVE-2019-3823: SMTP end-of-response out-of-bounds read
> […]

[1]: https://curl.haxx.se/changes.html

curl.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION curl-7.63.0-0
+# BEE_VERSION curl-7.64.0-0
 
 BEE_BUILDTYPE='autotools'