Update packages, add cache clean alias

packages

@@ -2,8 +2,8 @@ acpi
 adobe-source-han-sans-otc-fonts
 alsa-utils
 arandr
-arc-gtk-theme-git
-arc-icon-theme-git
+arc-gtk-theme
+arc-icon-theme
 brightnessctl
 capitaine-cursors
 checkbashisms
@@ -22,6 +22,8 @@ firefox
 fritzing
 gedit
 git
+gnome-calculator
+gnome-keyring
 gnome-themes-extra
 graphviz
 gucharmap
@@ -37,12 +39,12 @@ imagemagick
 inkscape
 intel-ucode
 iw
-jdk9-openjdk
+jdk10-openjdk
 krita
 libmtp
 libnotify-id
 libva-intel-driver
-libx264
+libva-mesa-driver
 linux-lts
 lxappearance
 lxsession
@@ -55,19 +57,23 @@ ntfs-3g
 openssh
 os-prober
 p7zip
+pacman-contrib
 pavucontrol
 platformio
 playerctl
 poppler-glib
 pulseaudio
 pulseaudio-alsa
+pwgen
 python2-click-5.1
 python2-setuptools
+python-pyusb
 qbittorrent
 qt5ct
 qt5-serialport
 qt5-styleplugins
 qt5-tools
+r
 reflector
 rofi
 rtmpdump
@@ -101,9 +107,11 @@ unrar
 unzip
 wpa_actiond
 wpa_supplicant
+x264
 x86_energy_perf_policy
 xarchiver
 xdotool
+xf86-video-vesa
 xorg-server
 xorg-xinit
 xorg-xinput