Bump pipreqs from 0.4.9 to 0.4.12 in /requirements

Bumps [pipreqs](https://github.com/bndr/pipreqs) from 0.4.9 to 0.4.12.
- [Release notes](https://github.com/bndr/pipreqs/releases)
- [Changelog](https://github.com/bndr/pipreqs/blob/master/HISTORY.rst)
- [Commits](https://github.com/bndr/pipreqs/commits/v0.4.12)

---
updated-dependencies:
- dependency-name: pipreqs
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements/tools.in

@@ -1,5 +1,5 @@
 detect-secrets==0.12.5
 pip-compile-multi==2.4.0
-pipreqs==0.4.9
+pipreqs==0.4.12
 pre-commit==2.6.0
 pytest==6.0.1

requirements/tools.txt

@@ -20,7 +20,7 @@ click==7.1.2
     #   pip-compile-multi
     #   pip-tools
 detect-secrets==0.12.5
-    # via -r requirements/tools.in
+    # via -r tools.in
 distlib==0.3.1
     # via virtualenv
 docopt==0.6.2
@@ -31,12 +31,6 @@ identify==1.4.28
     # via pre-commit
 idna==2.10
     # via requests
-importlib-metadata==1.7.0
-    # via
-    #   pluggy
-    #   pre-commit
-    #   pytest
-    #   virtualenv
 iniconfig==1.0.1
     # via pytest
 more-itertools==8.4.0
@@ -48,21 +42,21 @@ packaging==20.4
 pep517==0.10.0
     # via pip-tools
 pip-compile-multi==2.4.0
-    # via -r requirements/tools.in
+    # via -r tools.in
 pip-tools==6.0.1
     # via pip-compile-multi
-pipreqs==0.4.9
-    # via -r requirements/tools.in
+pipreqs==0.4.12
+    # via -r tools.in
 pluggy==0.13.1
     # via pytest
 pre-commit==2.6.0
-    # via -r requirements/tools.in
+    # via -r tools.in
 py==1.9.0
     # via pytest
 pyparsing==2.4.7
     # via packaging
 pytest==6.0.1
-    # via -r requirements/tools.in
+    # via -r tools.in
 pyyaml==5.4
     # via
     #   detect-secrets
@@ -87,8 +81,6 @@ virtualenv==20.0.31
     # via pre-commit
 yarg==0.1.9
     # via pipreqs
-zipp==3.1.0
-    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip