firefox_esr: Update version from 45.2.0 to 45.3.0

The Firefox extended support release 45.3.0 includes various stability
and security fixes [1][2].

From [3]:

> Multiple security issues have been found in the Mozilla Firefox web
> browser: Multiple memory safety errors, buffer overflows and other
> implementation errors may lead to the execution of arbitrary code,
> cross-site scriping, information disclosure and bypass of the
> same-origin policy.
>
> In Mitre's CVE dictionary: CVE-2016-2830, CVE-2016-2836,
> CVE-2016-2837, CVE-2016-2838, CVE-2016-5252, CVE-2016-5254,
> CVE-2016-5258, CVE-2016-5259, CVE-2016-5262, CVE-2016-5263,
> CVE-2016-5264, CVE-2016-5265.

[1] https://www.mozilla.org/en-US/firefox/45.3.0/releasenotes/
[2] https://www.mozilla.org/en-US/security/known-vulnerabilities/firefox-esr/#firefoxesr45.3
[3] https://www.debian.org/security/2016/dsa-3640

firefox_esr.be0

@@ -1,6 +1,6 @@
 #!/bin/env beesh
 
-# BEE_VERSION firefox_esr-45.2.0-1
+# BEE_VERSION firefox_esr-45.3.0-0
 
 #export BEE_TMP_TMPDIR=/dev/shm BEE_TMP_BUILDROOT=/dev/shm/bee-root BEE_MAKEFLAGS='-j80'