update changelog, set version to 1.1.4

Author: HelgeGehring

CHANGELOG.md

@@ -3,11 +3,18 @@ Changelog
 
 Unreleased
 ----------
+
+1.1.4
+-----
+
 * Waveguide: added add_left_bend and add_right_bend to make code easier readable
 * added alphanumeric_to_id as an inverse of id_to_alphanumeric
+* allow to limit the numbers of workers for parallel export
+* fixed oasis export
 
 1.1.3
 -----
+
 * Grating coupler: make_traditional_coupler now allows to apodize the period of the grating
 * Port: added with_width function to generate a copy of the Port with a certain width
 * Increased precision in add_straight_segment by evaluating derivative