updated script for people who dont have npm or yarn installed

scripts/binary_check.sh

@@ -1,11 +1,22 @@
 #! /bin/bash
 
-if ! [[ "$(npm list -g huffc)" =~ "empty" ]]; then
-  # huffc was installed via npm, return 0x00
-  echo -n 0x00
-elif [[ "$(yarn global list)" =~ "huffc" ]]; then
-  # huffc was installed via yarn, return 0x00
-  echo -n 0x00
-else
-  echo -n 0x01
+# Check if npm is installed
+if command -v npm &> /dev/null; then
+  if ! [[ "$(npm list -g huffc)" =~ "empty" ]]; then
+    # huffc was installed via npm, return 0x00
+    echo -n 0x00
+    exit 0
+  fi 
 fi
+
+# Check if yarn is installed
+if command -v yarn &> /dev/null; then
+  if [[ "$(yarn global list)" =~ "huffc" ]]; then
+    # huffc was installed via yarn, return 0x00
+    echo -n 0x00
+    exit 0
+  fi 
+fi
+
+# Else, return 0x01
+echo -n 0x01