feat: add clinical trials API fetching (#17)

Author: jsstevenson

.pre-commit-config.yaml

@@ -3,6 +3,7 @@ repos:
     rev: v4.6.0  # pre-commit-hooks version
     hooks:
       - id: check-added-large-files
+        args: ['--maxkb=1500']  # for clinicaltrials.gov API fixture
       - id: detect-private-key
       - id: trailing-whitespace
       - id: end-of-file-fixer