Bump pip from 9.0.3 to 21.1 in /contrib/deterministic-build

Bumps [pip](https://github.com/pypa/pip) from 9.0.3 to 21.1.
- [Release notes](https://github.com/pypa/pip/releases)
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@9.0.3...21.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

contrib/deterministic-build/requirements-binaries.txt

@@ -1,6 +1,6 @@
-pip==9.0.3 \
-    --hash=sha256:7bf48f9a693be1d58f49f7af7e0ae9fe29fd671cde8a55e6edca3581c4ef5796 \
-    --hash=sha256:c3ede34530e0e0b2381e7363aded78e0c33291654937e7373032fda04e8803e5
+pip==21.1 \
+    --hash=sha256:ea9f2668484893e90149fd5a6124e04651ffedd67203a8aaf030d31406b937a4 \
+    --hash=sha256:a810bf07c3723a28621c29abe8e34429fa082c337f89aea9a795865416b66d3e
 pycryptodomex==3.6.0 \
     --hash=sha256:023432d6938c17bd8ff5c4a3efcac7923e3724a42655e011580a84db0be0903b \
     --hash=sha256:11756a831e0cc2549fb67be50aca040495d7e20a47b2ab1cf77f0db6eaae75e0 \

contrib/deterministic-build/requirements-hw.txt

@@ -64,9 +64,9 @@ mnemonic==0.18 \
     --hash=sha256:02a7306a792370f4a0c106c2cf1ce5a0c84b9dbd7e71c6792fdb9ad88a727f1d
 pbkdf2==1.3 \
     --hash=sha256:ac6397369f128212c43064a2b4878038dab78dab41875364554aaf2a684e6979
-pip==9.0.3 \
-    --hash=sha256:7bf48f9a693be1d58f49f7af7e0ae9fe29fd671cde8a55e6edca3581c4ef5796 \
-    --hash=sha256:c3ede34530e0e0b2381e7363aded78e0c33291654937e7373032fda04e8803e5
+pip==21.1 \
+    --hash=sha256:ea9f2668484893e90149fd5a6124e04651ffedd67203a8aaf030d31406b937a4 \
+    --hash=sha256:a810bf07c3723a28621c29abe8e34429fa082c337f89aea9a795865416b66d3e
 protobuf==3.5.2.post1 \
     --hash=sha256:01ccd6d03449ae75b779fb5bf4ed62177d61afe3c5e6465ccf3f8b2e1a84afbe \
     --hash=sha256:1d92cc30b0b46cced33adde5853d920179eb5ea8eecdee9552502a7f29cc3f21 \

contrib/deterministic-build/requirements.txt

@@ -18,9 +18,9 @@ jsonrpclib-pelix==0.3.1 \
     --hash=sha256:bd89a6093bc4d47dc8a096197aacb827359944a4533be5193f3845f57b9f91b4
 pbkdf2==1.3 \
     --hash=sha256:ac6397369f128212c43064a2b4878038dab78dab41875364554aaf2a684e6979
-pip==9.0.3 \
-    --hash=sha256:7bf48f9a693be1d58f49f7af7e0ae9fe29fd671cde8a55e6edca3581c4ef5796 \
-    --hash=sha256:c3ede34530e0e0b2381e7363aded78e0c33291654937e7373032fda04e8803e5
+pip==21.1 \
+    --hash=sha256:ea9f2668484893e90149fd5a6124e04651ffedd67203a8aaf030d31406b937a4 \
+    --hash=sha256:a810bf07c3723a28621c29abe8e34429fa082c337f89aea9a795865416b66d3e
 protobuf==3.5.2.post1 \
     --hash=sha256:01ccd6d03449ae75b779fb5bf4ed62177d61afe3c5e6465ccf3f8b2e1a84afbe \
     --hash=sha256:1d92cc30b0b46cced33adde5853d920179eb5ea8eecdee9552502a7f29cc3f21 \