fix(LICENSE): update (#149)

Updated the LICENSE file with the current license
used by MaxMind's GeoLite2 databases.

Author: santiagoecheverri94

LICENSE

@@ -20,35 +20,31 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 
+DATABASES LICENSE (GeoLite2 databases)
 
-OPEN DATA LICENSE (GeoLite Country database)
-
-Copyright (c) 2008 MaxMind, Inc.  All Rights Reserved.
-
-All advertising materials and documentation mentioning features or use of
-this database must display the following acknowledgment:
-"This product includes GeoLite data created by MaxMind, available from
-http://maxmind.com/"
-
-Redistribution and use with or without modification, are permitted provided
-that the following conditions are met:
-1. Redistributions must retain the above copyright notice, this list of
-conditions and the following disclaimer in the documentation and/or other
-materials provided with the distribution. 
-2. All advertising materials and documentation mentioning features or use of
-this database must display the following acknowledgement:
-"This product includes GeoLite data created by MaxMind, available from
-http://maxmind.com/"
-3. "MaxMind" may not be used to endorse or promote products derived from this
-database without specific prior written permission.
-
-THIS DATABASE IS PROVIDED BY MAXMIND, INC ``AS IS'' AND ANY 
-EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
-DISCLAIMED. IN NO EVENT SHALL MAXMIND BE LIABLE FOR ANY 
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
+Copyright (c) 2012-2018 MaxMind, Inc.  All Rights Reserved.
+
+The GeoLite2 databases are distributed under the
+Creative Commons Attribution-ShareAlike 4.0 International License (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   https://creativecommons.org/licenses/by-sa/4.0/legalcode
+
+The attribution requirement may be met by including the following in all
+advertising and documentation mentioning features of or use of this
+database:
+
+This product includes GeoLite2 data created by MaxMind, available from
+<a href="http://www.maxmind.com">http://www.maxmind.com</a>.
+
+THIS DATABASE IS PROVIDED BY MAXMIND, INC ``AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL MAXMIND BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 DATABASE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.