v4.0.2

Fix #12

v4.0.1

Fixed some bugs.

Other issues fixed:
#1
#2
#3
#7

v4.0.0

Removed deprecated "debug" parameters.

v3.0.1

Don't escape unicode characters - it lead to bad messages when containing certain characters.

v3.0.0

v3

v2.6.0

add language to voice parameter

v2.5.1

strip slashes for SMS text

v2.5.0

add VoiceParams.debug

v2.2.1

sms: fixed ttl validation and added foreign_id validation

v2.2.0

added endpoint journal