textproc/scancode-toolkit: Unbreak at runtime after r505457

* Relax the version requirements for devel/py-attrs
* Do the same for devel/py-typing that was updated to 3.7 recently
* Bump PORTREVISION due changed package contents

MFH:		2019Q3 (blanket: runtime fix)

textproc/scancode-toolkit/Makefile

@@ -3,7 +3,7 @@
 PORTNAME=	scancode-toolkit
 DISTVERSIONPREFIX=	v
 DISTVERSION=	3.0.2
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	textproc python
 
 MAINTAINER=	kai@FreeBSD.org

textproc/scancode-toolkit/files/patch-setup.py

@@ -39,11 +39,15 @@
  
          # packagedcode
          'pefile >= 2018.8.8',
-@@ -183,7 +178,6 @@ setup(
+@@ -182,9 +177,8 @@ setup(
+         'click >= 6.0.0, < 7.0.0',
          'colorama >= 0.3.9',
          'pluggy >= 0.4.0, < 1.0',
-         'attrs >=17.4, < 19.0',
+-        'attrs >=17.4, < 19.0',
 -        'cattrs',
-         'typing >=3.6, < 3.7',
+-        'typing >=3.6, < 3.7',
++        'attrs >=17.4',
++        'typing >=3.6',
  
          # scancode outputs
+         'jinja2 >= 2.7.0, < 3.0.0',