Enable eslint-plugin-jest, eslint-plugin-cypress and wider scan

__mocks__/MERMAID.js

@@ -1,3 +1,3 @@
-export const curveBasis = 'basis'
-export const curveLinear = 'linear'
-export const curveCardinal = 'cardinal'
+export const curveBasis = 'basis';
+export const curveLinear = 'linear';
+export const curveCardinal = 'cardinal';

__mocks__/d3.js

@@ -1,11 +1,10 @@
-/* eslint-env jest */
 let NewD3 = function () {
-  function returnThis () {
-    return this
+  function returnThis() {
+    return this;
   }
   return {
     append: function () {
-      return NewD3()
+      return NewD3();
     },
     lower: returnThis,
     attr: returnThis,
@@ -16,41 +15,47 @@ let NewD3 = function () {
         getBBox: function () {
           return {
             height: 10,
-            width: 20
-          }
-        }
-      }
-    }
-  }
-}
+            width: 20,
+          };
+        },
+      },
+    },
+  };
+};
 
 export const select = function () {
-  return new NewD3()
-}
+  return new NewD3();
+};
 
 export const selectAll = function () {
-  return new NewD3()
-}
+  return new NewD3();
+};
 
-export const curveBasis = 'basis'
-export const curveLinear = 'linear'
-export const curveCardinal = 'cardinal'
+export const curveBasis = 'basis';
+export const curveLinear = 'linear';
+export const curveCardinal = 'cardinal';
 
 export const MockD3 = (name, parent) => {
-  const children = []
+  const children = [];
   const elem = {
-    get __children () { return children },
-    get __name () { return name },
-    get __parent () { return parent }
-  }
+    get __children() {
+      return children;
+    },
+    get __name() {
+      return name;
+    },
+    get __parent() {
+      return parent;
+    },
+  };
   elem.append = (name) => {
-    const mockElem = MockD3(name, elem)
-    children.push(mockElem)
-    return mockElem
-  }
-  elem.lower = jest.fn(() => elem)
-  elem.attr = jest.fn(() => elem)
-  elem.text = jest.fn(() => elem)
-  elem.style = jest.fn(() => elem)
-  return elem
-}
+    const mockElem = MockD3(name, elem);
+    children.push(mockElem);
+    return mockElem;
+  };
+  elem.lower = jest.fn(() => elem);
+  elem.attr = jest.fn(() => elem);
+  elem.text = jest.fn(() => elem);
+  elem.style = jest.fn(() => elem);
+  return elem;
+};