Add updatedevenv script

script/installalacritty

@@ -4,6 +4,11 @@
 # Note: run from ZSH in a different terminal emulator.
 set -e
 
+if pgrep alacritty > /dev/null; then
+  echo "Error: alacritty is running. Kill it and retry."
+  exit 1
+fi
+
 if ! [ -x "$(command -v cargo)" ]; then
   echo "Install Rust toolchain first"
   exit 1

script/updatedevenv

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+#
+# Update development environment
+
+set -e
+
+updatealacritty
+updatevim
+updatevimplugins