bump version

BOOK.md

@@ -16,25 +16,25 @@ gzip compressed binary from github.
 on linux/x64
 
 ```shell
-curl -L -o lo.gz https://github.com/just-js/lo/releases/download/0.0.15-pre/lo-linux-x64.gz
+curl -L -o lo.gz https://github.com/just-js/lo/releases/download/0.0.16-pre/lo-linux-x64.gz
 ```
 
 on linux/arm64
 
 ```shell
-curl -L -o lo.gz https://github.com/just-js/lo/releases/download/0.0.15-pre/lo-linux-arm64.gz
+curl -L -o lo.gz https://github.com/just-js/lo/releases/download/0.0.16-pre/lo-linux-arm64.gz
 ```
 
 on macos/x64
 
 ```shell
-curl -L -o lo.gz https://github.com/just-js/lo/releases/download/0.0.15-pre/lo-mac-x64.gz
+curl -L -o lo.gz https://github.com/just-js/lo/releases/download/0.0.16-pre/lo-mac-x64.gz
 ```
 
 on macos/arm64 (apple silicon)
 
 ```shell
-curl -L -o lo.gz https://github.com/just-js/lo/releases/download/0.0.15-pre/lo-mac-arm64.gz
+curl -L -o lo.gz https://github.com/just-js/lo/releases/download/0.0.16-pre/lo-mac-arm64.gz
 ```
 
 Then, we need to decompress the downloaded file and make it executable
@@ -122,7 +122,7 @@ let's check the version number of lo and the embedded JS engine it is using
 ```shell
 ./lo --version
 
-0.0.15-pre
+0.0.16-pre
 ```
 
 ### evaluating JavaScript
@@ -165,9 +165,9 @@ lo has a very basic repl which you can invoke as follows
 ⬛⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬛
 ⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛
 
- lo    0.0.15-pre        v8    12.3.219.12
+ lo    0.0.16-pre        v8    12.4.254.18
  arch  x64               os    linux
- boot  5.67 ms           rss   34078720
+ boot  6.02 ms           rss   34996224
 
 > 
 ```
@@ -181,8 +181,8 @@ we downloaded.
 
 {
   version: {
-    lo: "0.0.15-pre",
-    v8: "12.3.219.12"
+    lo: "0.0.16-pre",
+    v8: "12.4.254.18"
   },
 ...
 }

Makefile

@@ -6,7 +6,7 @@ CCARGS=-std=c++17 -c -fno-omit-frame-pointer -fno-rtti -fno-exceptions
 CARGS=-c -fno-omit-frame-pointer
 WARN=-Werror -Wpedantic -Wall -Wextra -Wno-unused-parameter
 OPT=-O3
-VERSION=0.0.15-pre
+VERSION=0.0.16-pre
 V8_VERSION=12.4
 RUNTIME=lo
 LO_HOME=$(shell pwd)