Resolve security/core#53 by updating tcpdf to latest version of 6.2.x

composer.lock

@@ -1980,16 +1980,16 @@
         },
         {
             "name": "tecnickcom/tcpdf",
-            "version": "6.2.13",
+            "version": "6.2.26",
             "source": {
                 "type": "git",
                 "url": "https://github.com/tecnickcom/TCPDF.git",
-                "reference": "95c5938aafe4b20df1454dbddb3e5005c0b26f64"
+                "reference": "367241059ca166e3a76490f4448c284e0a161f15"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/tecnickcom/TCPDF/zipball/95c5938aafe4b20df1454dbddb3e5005c0b26f64",
-                "reference": "95c5938aafe4b20df1454dbddb3e5005c0b26f64",
+                "url": "https://api.github.com/repos/tecnickcom/TCPDF/zipball/367241059ca166e3a76490f4448c284e0a161f15",
+                "reference": "367241059ca166e3a76490f4448c284e0a161f15",
                 "shasum": ""
             },
             "require": {
@@ -2018,13 +2018,13 @@
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "LGPLv3"
+                "LGPL-3.0"
             ],
             "authors": [
                 {
                     "name": "Nicola Asuni",
                     "email": "info@tecnick.com",
-                    "homepage": "http://nicolaasuni.tecnick.com"
+                    "role": "lead"
                 }
             ],
             "description": "TCPDF is a PHP class for generating PDF documents and barcodes.",
@@ -2038,7 +2038,7 @@
                 "pdf417",
                 "qrcode"
             ],
-            "time": "2017-04-26T08:14:48+00:00"
+            "time": "2018-10-16T17:24:05+00:00"
         },
         {
             "name": "totten/ca-config",