Update docs

scripts/prepare-docs.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -o errexit
+
+OUTDIR=docs/modules/api/pages/
+
+if [ ! -d node_modules ]; then
+  npm ci
+fi
+
+rm -rf "$OUTDIR"
+
+solidity-docgen \
+  -t docs \
+  -o "$OUTDIR" \
+  -e contracts/mocks,contracts/examples \
+  --output-structure readmes \
+  --helpers ./docs/helpers.js \
+  --solc-module ./scripts/prepare-docs-solc.js
+
+node scripts/gen-nav.js "$OUTDIR" > "$OUTDIR/../nav.adoc"