thunderbird: Update version from 45.2.0 to 45.4.0

Change-log 45.3.0 [1]:

> *   Fixed: Certain messages caused corruption of the drafts summary database.
> *   Fixed: "edit as new message" on a received message pre-filled the sender as the composing identity.
> *   Fixed: Disposition-Notification-To could not be used in mail.compose.other.header
> *   Fixed: Various [security fixes][2]

Chage-log 45.4.0 [3]:

> *   Fixed: "Apply columns to..." did not honor special folders
> *   Fixed: Threading broken when editing message draft, due to loss of Messageage-ID
> *   Fixed: Mail saved as template copied In-Reply-To and References from original email.
> *   Fixed: Additional spaces were inserted when drafts were edited.
> *   Fixed: Recipient addresses were shown in red despite being inserted from address book in some circumstances.
> *   Fixed: Display name was truncated if no separating space before email address.

[1] https://www.mozilla.org/en-US/thunderbird/45.3.0/releasenotes/
[2] https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird45.3
[3] https://www.mozilla.org/en-US/thunderbird/45.4.0/releasenotes/

thunderbird.be0

@@ -2,7 +2,7 @@
 
 #export BEE_TMP_TMPDIR=/dev/shm BEE_TMP_BUILDROOT=/dev/shm/bee-root BEE_MAKEFLAGS='-j80'
 
-# BEE_VERSION thunderbird-45.2.0-1
+# BEE_VERSION thunderbird-45.4.0-0
 
 SRCURL[0]="https://ftp.mozilla.org/pub/thunderbird/releases/${PKGVERSION}/source/thunderbird-${PKGVERSION}.source.tar.xz"