MLECO-3002: Update source gen requirements.txt

Signed-off-by: Richard Burton <richard.burton@arm.com>
Change-Id: I0f6bf4f891ced4b0da1802546ccf345383af1d93
diff --git a/scripts/py/requirements.txt b/scripts/py/requirements.txt
index ce74502..aeff2e0 100644
--- a/scripts/py/requirements.txt
+++ b/scripts/py/requirements.txt
@@ -1,12 +1,12 @@
-cffi==1.14.2
+cffi==1.14.3
 Jinja2==2.11.2
-llvmlite==0.33.0
+llvmlite==0.38.0
 MarkupSafe==1.1.1
-numba==0.50.1
+numba==0.55.1
 numpy==1.19.2
-Pillow==7.0.0
+Pillow==7.2.0
 pycparser==2.20
 resampy==0.2.2
-scipy==1.5.2
-six==1.15.0
+scipy==1.8.0
+six==1.16.0
 SoundFile==0.10.3.post1