Update docs pipeline to solidity-docgen@0.6 (#3707)

(cherry picked from commit c52625018b)

docs/templates/properties.js

@@ -0,0 +1,49 @@
+const { isNodeType } = require('solidity-ast/utils');
+const { slug } = require('./helpers');
+
+module.exports.anchor = function anchor ({ item, contract }) {
+  let res = '';
+  if (contract) {
+    res += contract.name + '-';
+  }
+  res += item.name;
+  if ('parameters' in item) {
+    const signature = item.parameters.parameters.map(v => v.typeName.typeDescriptions.typeString).join(',');
+    res += slug('(' + signature + ')');
+  }
+  if (isNodeType('VariableDeclaration', item)) {
+    res += '-' + slug(item.typeName.typeDescriptions.typeString);
+  }
+  return res;
+};
+
+module.exports.inheritance = function ({ item, build }) {
+  if (!isNodeType('ContractDefinition', item)) {
+    throw new Error('used inherited-items on non-contract');
+  }
+
+  return item.linearizedBaseContracts
+    .map(id => build.deref('ContractDefinition', id))
+    .filter((c, i) => c.name !== 'Context' || i === 0);
+};
+
+module.exports['has-functions'] = function ({ item }) {
+  return item.inheritance.some(c => c.functions.length > 0);
+};
+
+module.exports['has-events'] = function ({ item }) {
+  return item.inheritance.some(c => c.events.length > 0);
+};
+
+module.exports['inherited-functions'] = function ({ item }) {
+  const { inheritance } = item;
+  const baseFunctions = new Set(
+    inheritance.flatMap(c => c.functions.flatMap(f => f.baseFunctions ?? [])),
+  );
+  return inheritance.map((contract, i) => ({
+    contract,
+    functions: contract.functions.filter(f =>
+      !baseFunctions.has(f.id) && (f.name !== 'constructor' || i === 0),
+    ),
+  }));
+};