added kaiju env (issue #67)

workflow/envs/kaiju.yaml

+channels:
+  - conda-forge
+  - bioconda
+  - defaults
+dependencies:
+  - _libgcc_mutex=0.1=conda_forge
+  - _openmp_mutex=4.5=0_gnu
+  - ca-certificates=2020.6.20=hecda079_0
+  - certifi=2020.6.20=py38h32f6830_0
+  - gettext=0.19.8.1=hc5be6a0_1002
+  - kaiju=1.7.3=h8b12597_1
+  - ld_impl_linux-64=2.34=h53a641e_7
+  - libffi=3.2.1=he1b5a44_1007
+  - libgcc-ng=9.2.0=h24d8f2e_2
+  - libgomp=9.2.0=h24d8f2e_2
+  - libidn2=2.3.0=h516909a_0
+  - libstdcxx-ng=9.2.0=hdf63c60_2
+  - libunistring=0.9.10=h14c3975_0
+  - ncurses=6.2=he1b5a44_1
+  - openssl=1.1.1g=h516909a_0
+  - perl=5.26.2=h516909a_1006
+  - pip=20.1.1=py_1
+  - python=3.8.5=h425cb1d_1_cpython
+  - python_abi=3.8=1_cp38
+  - readline=8.0=he28a2e2_2
+  - setuptools=49.2.0=py38h32f6830_0
+  - sqlite=3.32.3=hcee41ef_1
+  - tk=8.6.10=hed695b0_0
+  - wget=1.20.1=h22169c7_0
+  - wheel=0.34.2=py_1
+  - xz=5.2.5=h516909a_1
+  - zlib=1.2.11=h516909a_1006