fix: make $plugin_dir absolute path (#63)

Co-authored-by: James Hegedus <jthegedus@hey.com>

Author: janaaronlee

bin/exec-env

@@ -2,8 +2,11 @@
 
 set -euo pipefail
 
-current_script_path="${BASH_SOURCE[0]}"
-plugin_dir="$(dirname "$(dirname "$current_script_path")")"
+current_script_dir="$(
+	cd -- "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1
+	pwd -P
+)"
+plugin_dir="$(dirname "$current_script_dir")"
 
 # shellcheck source=../lib/utils.bash
 source "${plugin_dir}/lib/utils.bash"