update version to v1.2.3

Author: levenc

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: posologyr
 Title: Individual Dose Optimization using Population Pharmacokinetics
-Version: 1.2.2.9000
+Version: 1.2.3
 Authors@R: c(
     person("Cyril","Leven",role = c("aut", "cre","cph"),
            email = "cyril.leven@chu-brest.fr",

NEWS.md

@@ -1,4 +1,4 @@
-# posologyr v1.2.2.9000
+# posologyr v1.2.3
 
 ## Bug fix
 * Fix a bug in `poso_dose_conc()`, `poso_dose_auc()` and `poso_inter_cmin()` where the returned estimate of the target value to be optimized against was always equal to zero.