os/macos: flesh out install/update scripts

os/macos/install

@@ -1,9 +1,15 @@
 #!/bin/bash
 
 # Install homebrew
-if ! command -v brew; then
+if ! command -v brew >/dev/null; then
     ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
 
     # Installing essentials
-    brew install wget curl make
+    brew install wget curl make tree
+    # Essential apps
+    brew cask install appcleaner iterm2 imageoptim imagealpha
 fi
+
+brew install \
+    hub the_silver_searcher pass keybase ffmpeg fasd tmux \
+    neofetch youtube-dl

os/macos/update

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-if command -v brew; then
+if command -v brew >/dev/null; then
     brew update
     brew upgrade
     brew cleanup