fix(hjson): support newer gobin (#46)

shell/hjson-json.sh

@@ -1,14 +1,11 @@
 #!/usr/bin/env bash
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
+GOBIN="$DIR/gobin.sh"
 
 # shellcheck source=./lib/bootstrap.sh
 source "$DIR/lib/bootstrap.sh"
 
-# Ensure gobin has been downloaded
-"$DIR/gobin.sh" download-only >/dev/null 2>&1
-
-# TODO: use outreach gobin when it supports non-go modules. Or, just rewrite this in Go :)
-HJSON_CLI=$("$(get_repo_directory)/bin/gobin-go-1.15" -p github.com/hjson/hjson-go/hjson-cli)
+HJSON_CLI=$("$GOBIN" -p github.com/hjson/hjson-go/hjson-cli@ca8d4fec02fe4da51776c0c1f4faac480a61eaa9)
 
 EXISTING_VERSION="0.0.1"
 if [[ -e $2 ]]; then