requirements: pin PyQt5-sip version due to build problems

see https://tickets.metabrainz.org/browse/PICARD-1472
having issues on MacOS to codesign sip.so when PyQt5-sip==4.19.15:
PyQt5/sip.so malformed object (unknown load command 7)

contrib/deterministic-build/requirements-binaries.txt

@@ -35,19 +35,19 @@ PyQt5==5.11.3 \
     --hash=sha256:ac1eb5a114b6e7788e8be378be41c5e54b17d5158994504e85e43b5fca006a39 \
     --hash=sha256:d2309296a5a79d0a1c0e6c387c30f0398b65523a6dcc8a19cc172e46b949e00d \
     --hash=sha256:e85936bae1581bcb908847d2038e5b34237a5e6acc03130099a78930770e7ead
-PyQt5-sip==4.19.15 \
-    --hash=sha256:0aed4266e52f4d11947439d9df8c57d4578e92258ad0d70645f9f69b627b35c7 \
-    --hash=sha256:15750a4a3718c68ba662eede7310612aedad70c9727497908bf2eeddd255d16f \
-    --hash=sha256:2071265b7a603354b624b6cfae4ea032719e341799fb925961fd192f328fd203 \
-    --hash=sha256:31a59f76168df007b480b9382256c20f8898c642e1394df2990559f0f6389f66 \
-    --hash=sha256:39ce455bf5be5c1b20db10d840a536f70c3454be3baa7adca22f67ed90507853 \
-    --hash=sha256:5d8a4b8e75fa6c9f837ea92793f1aeacbf3929f1d11cdf36f9604c1876182aca \
-    --hash=sha256:6bf9bacac776257390dd3f8a703d12c8228e4eb1aa0b191f1550965f44e4c23a \
-    --hash=sha256:87a76841e07e6dae5df34dded427708b5ea8d605c017e0bb6e56a7354959271e \
-    --hash=sha256:9f0ad4198f2657da9d59a393c266959362c517445cace842051e5ad564fa8fb0 \
-    --hash=sha256:cbb0f24e3bfa1403bf3a05f30066d4457509aa411d6c6823d02b0508b787b8ea \
-    --hash=sha256:d38d379fa4f5c86a8ea92b8fab42748f37de093d21a25c34b2339eb2764ee5d5 \
-    --hash=sha256:f24413d34707525a0fe1448b9574089242b9baa7c604ae5714abef9ad1749839
+PyQt5-sip==4.19.13 \
+    --hash=sha256:125f77c087572c9272219cda030a63c2f996b8507592b2a54d7ef9b75f9f054d \
+    --hash=sha256:14c37b06e3fb7c2234cb208fa461ec4e62b4ba6d8b32ca3753c0b2cfd61b00e3 \
+    --hash=sha256:1cb2cf52979f9085fc0eab7e0b2438eb4430d4aea8edec89762527e17317175b \
+    --hash=sha256:4babef08bccbf223ec34464e1ed0a23caeaeea390ca9a3529227d9a57f0d6ee4 \
+    --hash=sha256:53cb9c1208511cda0b9ed11cffee992a5a2f5d96eb88722569b2ce65ecf6b960 \
+    --hash=sha256:549449d9461d6c665cbe8af4a3808805c5e6e037cd2ce4fd93308d44a049bfac \
+    --hash=sha256:5f5b3089b200ff33de3f636b398e7199b57a6b5c1bb724bdb884580a072a14b5 \
+    --hash=sha256:a4d9bf6e1fa2dd6e73f1873f1a47cee11a6ba0cf9ba8cf7002b28c76823600d0 \
+    --hash=sha256:a4ee6026216f1fbe25c8847f9e0fbce907df5b908f84816e21af16ec7666e6fe \
+    --hash=sha256:a91a308a5e0cc99de1e97afd8f09f46dd7ca20cfaa5890ef254113eebaa1adff \
+    --hash=sha256:b0342540da479d2713edc68fb21f307473f68da896ad5c04215dae97630e0069 \
+    --hash=sha256:f997e21b4e26a3397cb7b255b8d1db5b9772c8e0c94b6d870a5a0ab5c27eacaa
 setuptools==41.0.1 \
     --hash=sha256:a222d126f5471598053c9a77f4b5d4f26eaa1f150ad6e01dcf1a42e185d05613 \
     --hash=sha256:c7769ce668c7a333d84e17fe8b524b1c45e7ee9f7908ad0a73e1eda7e6a5aebf

contrib/requirements/requirements-binaries.txt

@@ -1,2 +1,3 @@
 PyQt5<5.12
 pycryptodomex<3.8
+PyQt5-sip<=4.19.13