Default env value and readme corrections.

Author: PaulDalek

.env.sample

@@ -4,7 +4,7 @@ PUPPETEER_TEMP_DIR = ./tmp/
 # HIGHCHARTS CONFIG
 HIGHCHARTS_VERSION = latest
 HIGHCHARTS_CDN_URL = https://code.highcharts.com/
-HIGHCHARTS_USE_NPM = true
+HIGHCHARTS_USE_NPM = false
 HIGHCHARTS_CORE_SCRIPTS =
 HIGHCHARTS_MODULE_SCRIPTS =
 HIGHCHARTS_INDICATOR_SCRIPTS =

README.md

@@ -567,7 +567,7 @@ This is useful to e.g. upgrade to the latest HC version without downtime.
 
 IMPORTANT NOTE:
 
-This is not possible when using the Highcharts dependency package directly (by setting the `useNpm` true).
+This is not possible when using the Highcharts dependency package directly (by setting the `useNpm` to **true**).
 
 # Node.js Module