fix: pump up to the SDK to fix cookie decoding issue and the security…

… error while using localStorage/sessionStorage (#62)

template.tpl

@@ -1243,7 +1243,7 @@ const makeTableMap = require('makeTableMap');
 const JSON = require('JSON');
 
 // Constants
-const WRAPPER_VERSION = '3.7.12';
+const WRAPPER_VERSION = '3.8.0';
 const JS_URL = 'https://cdn.amplitude.com/libs/analytics-browser-gtm-wrapper-'+WRAPPER_VERSION+'.js.br';
 const LOG_PREFIX = '[Amplitude / GTM] ';
 const WRAPPER_NAMESPACE = '_amplitude';