fix(BaseSchema): get paragraph attributes from token attributes (#875)

Author: d3m1d0v

src/extensions/base/BaseSchema/BaseSchemaSpecs/index.ts

@@ -63,7 +63,15 @@ export const BaseSchemaSpecs: ExtensionAuto<BaseSchemaSpecsOptions> = (builder,
                       }
                     : undefined,
             },
-            fromMd: {tokenSpec: {name: BaseNode.Paragraph, type: 'block'}},
+            fromMd: {
+                tokenSpec: {
+                    name: BaseNode.Paragraph,
+                    type: 'block',
+                    getAttrs(token) {
+                        return Object.fromEntries(token.attrs || []);
+                    },
+                },
+            },
             toMd: (state, node, parent) => {
                 /*
                     An empty line is added only if there is some content in the parent element.