Debian clean up (#180)

* debian: bump compat level to 10

Fixes the following warning:

dh_auto_clean: warning: Compatibility levels before 10 are deprecated
(level 8 in use)

debian/compat is replaced with debhelper-compat build dependency.

Remove "--with autotools-dev" from debian/rules as the package uses
plain makefiles and not autotools. Also remove autotools-dev build
dependency.

* src/timeshift-gtk.desktop: remove MimeType and add Keywords

These changes apply the following Debian patches:

https://salsa.debian.org/debian/timeshift/-/blob/master/debian/patches/0003-Remove-Mime-Type-record-form-timeshift-gtk.desktop.patch
https://salsa.debian.org/debian/timeshift/-/blob/master/debian/patches/0006-Add_keywords_to_dot_desktop.patch

debian/compat

@@ -1 +0,0 @@
-8

debian/control

@@ -2,7 +2,7 @@ Source: timeshift
 Section: utils
 Priority: extra
 Maintainer: Linux Mint <root@linuxmint.com>
-Build-Depends: debhelper (>= 8.0.0), autotools-dev, gzip, valac, libgtk-3-dev, libgee-0.8-dev, libjson-glib-dev, libvte-2.91-dev, libxapp-dev
+Build-Depends: debhelper-compat (= 10), gzip, valac, libgtk-3-dev, libgee-0.8-dev, libjson-glib-dev, libvte-2.91-dev, libxapp-dev
 Standards-Version: 3.9.3
 Homepage: https://github.com/linuxmint/timeshift
 

debian/rules

@@ -12,4 +12,4 @@
 override_dh_usrlocal: 
 
 %:
-	dh $@  --with autotools-dev
+	dh $@

src/timeshift-gtk.desktop

@@ -1,6 +1,5 @@
 [Desktop Entry]
 Name=Timeshift
-MimeType=
 Exec=timeshift-launcher
 Type=Application
 GenericName=System Restore Utility
@@ -30,3 +29,4 @@ Comment[ru]=Программа для восстановления систем
 X-KDE-StartupNotify=false
 Categories=System;
 X-GNOME-UsesNotifications=true
+Keywords=backup;btrfs;rsync;