Update requirements-dev.txt

 * Removed pbr
 * Added doc8==1.1.2
 * Update docutils to 0.19

Signed-off-by: Chin Yeung Li <tli@nexb.com>

Author: chinyeungli

requirements-dev.txt

@@ -1,7 +1,7 @@
 bleach==4.1.0
 build==0.7.0
 commonmark==0.9.1
-docutils==0.18.1
+docutils==0.19
 et-xmlfile==1.1.0
 execnet==1.9.0
 iniconfig==1.1.1
@@ -21,4 +21,4 @@ rich==12.3.0
 secretstorage==3.3.2
 tomli==1.2.3
 twine==3.8.0
-pbr==5.0.0
+doc8==1.1.2