Update awscli, botocore, select requirements

* awscli 1.16.169 → 1.16.190: Update various commands to latest versions
* botocore 1.12.159 → 1.12.180: Update clients to latest versions

These allowed additional updates of requirements:

* urllib3 1.24.3 → 1.25.3: Validate certs, and load system CA certs when
  specific cert locations are unspecified.
* PyYAML 3.13 → 5.1: Resolved CVE-2017-18342, load() now does the same
  as safe_load() by default. awscli was already using an equivalent to
  safe_load, and we we do not use PyYAML in our app code.

requirements/constraints.txt

@@ -89,10 +89,9 @@ configparser==3.7.4 \
 py==1.8.0 \
     --hash=sha256:64f65755aee5b381cea27766a3a147c3f15b9b6b9ac88676de66ba2ae36793fa \
     --hash=sha256:dc639b046a6e2cff5bbe40194ad65936d6ba360b52b3c3fe1d08a82dd50b5e53
-# Used by several packages, many that require <1.25
-urllib3==1.24.3 \
-    --hash=sha256:2393a695cd12afedd0dcb26fe5d50d0cf248e5a66f75dbd89a3d4eb333a61af4 \
-    --hash=sha256:a637e5fae88995b256e3409dc4d52c2e2e0ba32c42a6365fee8bbd2238de3cfb # pyup: <1.25
+urllib3==1.25.3 \
+    --hash=sha256:b246607a25ac80bedac05c6f282e3cdaf3afb65420fd024ac94435cabe6e18d1 \
+    --hash=sha256:dbe59173209418ae49d485b87d1681aefa36252ee85884c31346debd19463232
 httplib2==0.12.1 \
     --hash=sha256:4ba6b8fd77d0038769bf3c33c9a96a6f752bc4cdf739701fdcaf210121f399d4
 pyasn1==0.4.5 \
@@ -174,27 +173,27 @@ dparse==0.4.1 \
 pyparsing==2.3.1 \
     --hash=sha256:66c9268862641abcac4a96ba74506e594c884e3f57690a696d21ad8210ed667a \
     --hash=sha256:f6c5ef0d7480ad048c054c37632c67fca55299990fff127850181659eea33fc3
-PyYAML==3.13 \
-    --hash=sha256:3d7da3009c0f3e783b2c873687652d83b1bbfd5c88e9813fb7e5b03c0dd3108b \
-    --hash=sha256:3ef3092145e9b70e3ddd2c7ad59bdd0252a94dfe3949721633e41344de00a6bf \
-    --hash=sha256:40c71b8e076d0550b2e6380bada1f1cd1017b882f7e16f09a65be98e017f211a \
-    --hash=sha256:558dd60b890ba8fd982e05941927a3911dc409a63dcb8b634feaa0cda69330d3 \
-    --hash=sha256:a7c28b45d9f99102fa092bb213aa12e0aaf9a6a1f5e395d36166639c1f96c3a1 \
-    --hash=sha256:aa7dd4a6a427aed7df6fb7f08a580d68d9b118d90310374716ae90b710280af1 \
-    --hash=sha256:bc558586e6045763782014934bfaf39d48b8ae85a2713117d16c39864085c613 \
-    --hash=sha256:d46d7982b62e0729ad0175a9bc7e10a566fc07b224d2c79fafb5e032727eaa04 \
-    --hash=sha256:d5eef459e30b09f5a098b9cea68bebfeb268697f78d647bd255a085371ac7f3f \
-    --hash=sha256:e01d3203230e1786cd91ccfdc8f8454c8069c91bee3962ad93b87a4b2860f537 \
-    --hash=sha256:e170a9e6fcfd19021dd29845af83bb79236068bf5fd4df3327c1be18182b2531
+PyYAML==5.1 \
+    --hash=sha256:1adecc22f88d38052fb787d959f003811ca858b799590a5eaa70e63dca50308c \
+    --hash=sha256:436bc774ecf7c103814098159fbb84c2715d25980175292c648f2da143909f95 \
+    --hash=sha256:460a5a4248763f6f37ea225d19d5c205677d8d525f6a83357ca622ed541830c2 \
+    --hash=sha256:5a22a9c84653debfbf198d02fe592c176ea548cccce47553f35f466e15cf2fd4 \
+    --hash=sha256:7a5d3f26b89d688db27822343dfa25c599627bc92093e788956372285c6298ad \
+    --hash=sha256:9372b04a02080752d9e6f990179a4ab840227c6e2ce15b95e1278456664cf2ba \
+    --hash=sha256:a5dcbebee834eaddf3fa7366316b880ff4062e4bcc9787b78c7fbb4a26ff2dd1 \
+    --hash=sha256:aee5bab92a176e7cd034e57f46e9df9a9862a71f8f37cad167c6fc74c65f5b4e \
+    --hash=sha256:c51f642898c0bacd335fc119da60baae0824f2cde95b0330b56c0553439f0673 \
+    --hash=sha256:c68ea4d3ba1705da1e0d85da6684ac657912679a649e8868bd850d2c299cce13 \
+    --hash=sha256:e23d0cc5299223dcc37885dae624f382297717e459ea24053709675a976a3e19
 attrs==19.1.0 \
     --hash=sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79 \
     --hash=sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399
 pluggy==0.12.0 \
     --hash=sha256:0825a152ac059776623854c1543d65a4ad408eb3d33ee114dff91e57ec6ae6fc \
     --hash=sha256:b9817417e95936bf75d85d3f8767f7df6cdde751fc40aed3bb3074cbcb77757c
-botocore==1.12.159 \
-    --hash=sha256:2f90e4d435b45bd708046b8e647c649bb7ff48f26892b86a2869f271a33270f0 \
-    --hash=sha256:35a199173d91791b9a4d69e1a02752fa5276f57b56cd1d26dd3144883c9f21e9
+botocore==1.12.180 \
+    --hash=sha256:a2ceaa00724228a961ef6f97da60ab09f3161a76e2f3ae82a49be396ca1083fc \
+    --hash=sha256:f049dbfe83423f5cf350a861861e7f904967dea5e142ec1a17c70c07f9fdb117
 colorama==0.3.9 \
     --hash=sha256:463f8483208e921368c9f306094eb6f725c6ca42b0f97e313cb5d5512459feda \
     --hash=sha256:48eb22f4f8461b1df5734a074b57042430fb06e1d61bd1e11b078c0fe6d7a1f1

requirements/default.txt

@@ -165,9 +165,9 @@ django-npm==1.0.0 \
 markus==1.2.0 \
     --hash=sha256:86bbeb16de1b1920d291c81a39b7a7c61c94b665cd8d10c6b69c994ce4fd5bcc \
     --hash=sha256:9bce7bd152578703a8e4aa5a765c7c0d94bcdd69f7bc5e42d29b893e3abf2e5a
-awscli==1.16.169 \
-    --hash=sha256:6565f3c440b6c78796ed4ea1a52ea24dbc8feff064233e989bd6f95493516dcc \
-    --hash=sha256:fce6accbd78c8fc176d1fd36745ae1bfa235a0c99e0c64a0b97107f7c5d2368d
+awscli==1.16.190 \
+    --hash=sha256:7c44d68553a0d3d176e15ded469f9257654c511b69c6fc9fc390600d554a769a \
+    --hash=sha256:df62bd3ad1dd0b0c6209c9c2526f936ee1eb6a0d1e3c54098f61ee47c33f4f63
 moto==1.3.8 \
     --hash=sha256:9cb02134148fbe3ed81f11d6ab9bd71bbd6bc2db7e59a45de77fb1d0fedb744e \
     --hash=sha256:fc354598cb67cae1b18318b1e98955004bc27e05404a84ffa9c68654334638f2