scripts: requirements: update pylint fixed version

The current version of pylint is 2 years old at this point,
and it's got a bug (pylint-dev/pylint#3882)
which is leading to false positives on ncs_west_helpers.py:

 E1136:Value 'Union' is unsubscriptable (unsubscriptable-object)
File:scripts/west_commands/ncs_west_helpers.py
Line:78
Column:36
 E1136:Value 'Union' is unsubscriptable (unsubscriptable-object)
File:scripts/west_commands/ncs_west_helpers.py
Line:326
Column:18
 E1136:Value 'Union' is unsubscriptable (unsubscriptable-object)
File:scripts/west_commands/ncs_west_helpers.py
Line:78
Column:36
 E1136:Value 'Union' is unsubscriptable (unsubscriptable-object)
File:scripts/west_commands/ncs_west_helpers.py
Line:326
Column:18
 E1136:Value 'Optional' is unsubscriptable (unsubscriptable-object)
File:scripts/west_commands/pygit2_helpers.py
Line:188
Column:46
 E1136:Value 'Optional' is unsubscriptable (unsubscriptable-object)
File:scripts/west_commands/ncs_commands.py
Line:44
Column:38

Update it to the latest version. We have to update astroid,
typing-extensions, and colorama as well as a side effect.

Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>

scripts/requirements-fixed.txt

@@ -7,7 +7,7 @@ alabaster==0.7.12
 anytree==2.8.0
 appdirs==1.4.4
 arrow==0.17.0
-astroid==2.4.2
+astroid==2.15.0
 attrs==20.3.0
 Babel==2.9.1
 breathe==4.26.1
@@ -19,7 +19,7 @@ cffi==1.14.4
 chardet==4.0.0
 click==7.1.2
 cmsis-pack-manager==0.2.10
-colorama==0.4.4
+colorama==0.4.6
 commonmark==0.9.1
 coverage==5.4
 cryptography==3.4.8
@@ -64,7 +64,7 @@ pygit2==1.10.0
 Pygments==2.7.4
 pykwalify==1.8.0
 pylink-square==0.8.1
-pylint==2.6.0
+pylint==2.16.4
 pyocd==0.29.0
 pyparsing==2.4.7
 pyserial==3.5
@@ -99,7 +99,7 @@ tabulate==0.8.7
 toml==0.10.2
 tomli==2.0.1
 typed-ast==1.5.4
-typing-extensions==3.7.4.3
+typing-extensions==4.4.0
 urllib3==1.26.4
 wcwidth==0.2.5
 west==1.0.0