package/tk: bump to version 8.6.13

For release note, see:
https://sourceforge.net/projects/tcl/files/Tcl/8.6.13/tcltk-release-notes-8.6.13.txt

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/tk/tk.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  12395c1f3fcb6bed2938689f797ea3cdf41ed5cb6c4766eec8ac949560310630  tk8.6.12-src.tar.gz
+sha256  2e65fa069a23365440a3c56c556b8673b5e32a283800d8d9b257e3f584ce0675  tk8.6.13-src.tar.gz
 sha256  2cde822b93ca16ae535c954b7dfe658b4ad10df2a193628d1b358f1765e8b198  license.terms

package/tk/tk.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 TK_VERSION_MAJOR = 8.6
-TK_VERSION = $(TK_VERSION_MAJOR).12
+TK_VERSION = $(TK_VERSION_MAJOR).13
 TK_SOURCE = tk$(TK_VERSION)-src.tar.gz
 TK_SITE = http://downloads.sourceforge.net/project/tcl/Tcl/$(TK_VERSION)
 TK_LICENSE = TCL