fixes

common.sh

@@ -40,7 +40,7 @@ fi
 NVIM_REQUIRED_BINARIES=(
   cmake
   curl
-  fz
+  fzf
   g++
   gcc
   git
@@ -52,6 +52,7 @@ NVIM_REQUIRED_BINARIES=(
   sed
   shfmt
   tar
+  tree-sitter
   unzip
   wget
   zip
@@ -76,7 +77,7 @@ function error_exit() {
 }
 
 function check_binary() {
-  if !command -v "$1" >/dev/null 2>&1; then
+  if ! command -v "$1" >/dev/null 2>&1; then
     error_exit "failed to find required binary: $1"
   fi
 }