[Fix] Move coveralls to dev dependency

Get database from dsn

Fix dropIndex for compound indexes with sorting order

Added issue template files

Add config for codacy

Fix truncate on models

According to docs array or object might be returned, so we need to add options. See https://docs.mongodb.com/php-library/v1.5/reference/method/MongoDBCollection-drop/

[Updated PR#1476] Add explanation for database migration resets

Co-Authored-By: theminer3746 <theminer@theminerdev.com>

[Updated PR#1556] Allow setting hint option on QueryBuilder

Co-Authored-By: Manan Jadhav <jadhavm@uwindsor.ca>

[Updated PR#1886] Fix Regex example

Fixed a regex example which accepts two parameters instead of one http://docs.php.net/manual/en/mongodb-bson-regex.construct.php#refsect1-mongodb-bson-regex.construct-examplesCo-Authored-By: ryan7n <ryan7n@users.noreply.github.com>

[Updated PR#1468] Fix assertObjectNotHasAttribute cannot test magic attributes

Merged from halaei:fix-test-asser-object-not-has-attribute

[Updated PR#1746] Add MustVerifyEmail

HasOne / HasMany must respect $localKey parameter

[Updated PR#1746] Add MustVerifyEmail

 Add MorphMany relation to replaced whereIn method.

(cherry picked from commit 1115bf5e545f2edc06261336aefbd1e1c5d188fc)

(cherry picked from commit 16a1121098e3fb80c684dccf02ecfb200969beee)

[refactor] Readme