fix(isMobilePhone): fix el-GR validation - add missing ranges and correctly exclude certain ranges (#2112)

* fix(isMobilePhone): el-GR RegExp fixed

update the RegExp to correctly match (and exclude) number ranges as per  official ITU numbering plan:
https://web.archive.org/web/20221205170159/https://www.itu.int/dms_pub/itu-t/oth/02/02/T02020000550002PDFE.pdf

fixes #2111

* tests: update tests for fixed el-GR RegExp

belongs to #2111

Author: pano9000

src/lib/isMobilePhone.js

@@ -31,7 +31,7 @@ const phones = {
   'de-CH': /^(\+41|0)([1-9])\d{1,9}$/,
   'de-LU': /^(\+352)?((6\d1)\d{6})$/,
   'dv-MV': /^(\+?960)?(7[2-9]|91|9[3-9])\d{7}$/,
-  'el-GR': /^(\+?30|0)?(69\d{8})$/,
+  'el-GR': /^(\+?30|0)?6(8[5-9]|9(?![26])[0-9])\d{7}$/,
   'el-CY': /^(\+?357?)?(9(9|6)\d{6})$/,
   'en-AI': /^(\+?1|0)264(?:2(35|92)|4(?:6[1-2]|76|97)|5(?:3[6-9]|8[1-4])|7(?:2(4|9)|72))\d{4}$/,
   'en-AU': /^(\+?61|0)4\d{8}$/,

test/validators.js

@@ -7761,8 +7761,22 @@ describe('Validators', () => {
         locale: 'el-GR',
         valid: [
           '+306944848966',
-          '6944848966',
           '306944848966',
+          '06904567890',
+          '6944848966',
+          '6904567890',
+          '6914567890',
+          '6934567890',
+          '6944567890',
+          '6954567890',
+          '6974567890',
+          '6984567890',
+          '6994567890',
+          '6854567890',
+          '6864567890',
+          '6874567890',
+          '6884567890',
+          '6894567890',
         ],
         invalid: [
           '2102323234',
@@ -7772,6 +7786,12 @@ describe('Validators', () => {
           '68129485729',
           '6589394827',
           '298RI89572',
+          '6924567890',
+          '6964567890',
+          '6844567890',
+          '690456789',
+          '00690456789',
+          'not a number',
         ],
       },
       {