message: fix: material theme input container on IE
diff: @@ -68,11 +68,12 @@ $ng-select-bg: #ffffff !default;
  content: '';
  width: 100%;
  bottom: 0;
  + left: 0;
  position: absolute;
  transition: border-color .3s cubic-bezier(.55, 0, .55, .2);
  }
  .ng-value-container {
  - align-items: baseline;
  + align-items: stretch;
  padding: .4375em 0;
  border-top: .84375em solid transparent;
  .ng-placeholder {
  