Do explicit imports for d3 instead of wildcards

src/diagrams/er/erRenderer.js

@@ -1,5 +1,5 @@
 import graphlib from 'graphlib';
-import * as d3 from 'd3';
+import { line, curveBasis, select } from 'd3';
 import erDb from './erDb';
 import erParser from './parser/erDiagram';
 import dagre from 'dagre';
@@ -136,15 +136,14 @@ const drawRelationshipFromLayout = function(svg, rel, g, insert) {
   const edge = g.edge(rel.entityA, rel.entityB, getEdgeName(rel));
 
   // Get a function that will generate the line path
-  const lineFunction = d3
-    .line()
+  const lineFunction = line()
     .x(function(d) {
       return d.x;
     })
     .y(function(d) {
       return d.y;
     })
-    .curve(d3.curveBasis);
+    .curve(curveBasis);
 
   // Insert the line at the right place
   const svgPath = svg
@@ -271,7 +270,7 @@ export const draw = function(text, id) {
   }
 
   // Get a reference to the svg node that contains the text
-  const svg = d3.select(`[id='${id}']`);
+  const svg = select(`[id='${id}']`);
 
   // Add cardinality marker definitions to the svg
   erMarkers.insertMarkers(svg, conf);