Bump numpy from 1.19.3 to 1.21.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.19.3 to 1.21.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst.txt)
- [Commits](numpy/numpy@v1.19.3...v1.21.0)

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

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

requirements.txt

@@ -15,10 +15,12 @@ h5py==3.1.0
 idna==2.9
 importlib-metadata==1.6.0
 iniconfig==1.1.1
+libclang==12.0.0
+keras==2.7.0
 Keras-Preprocessing==1.1.2
 Markdown==3.2.2
 mxnet==1.6.0
-numpy==1.19.3
+numpy==1.21.0
 oauthlib==3.1.0
 opt-einsum==3.3.0
 packaging==20.4
@@ -37,10 +39,11 @@ requests-oauthlib==1.3.0
 rsa==4.7
 scipy==1.4.1
 six==1.15.0
-tensorboard==2.5.0
+tensorboard==2.7.0
 tensorboard-plugin-wit==1.6.0.post3
-tensorflow==2.5.2
-tensorflow-estimator==2.5.0
+tensorflow==2.7.0
+tensorflow-estimator==2.7.0
+tensorflow-io-gcs-filesystem==0.23.1
 termcolor==1.1.0
 toml==0.10.1
 urllib3==1.26.5