adds middle dot glyph (U+00B7) to bold italic set

source/Hack-BoldItalic.ufo/glyphs/contents.plist

@@ -810,6 +810,8 @@
 	<string>percent.glif</string>
 	<key>period</key>
 	<string>period.glif</string>
+	<key>periodcentered</key>
+	<string>periodcentered.glif</string>
 	<key>perthousand</key>
 	<string>perthousand.glif</string>
 	<key>peseta</key>

source/Hack-BoldItalic.ufo/glyphs/periodcentered.glif

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="periodcentered" format="1">
+  <advance width="1233"/>
+  <unicode hex="00B7"/>
+  <outline>
+    <contour>
+      <point x="616" y="576" type="curve" name="hr00" smooth="yes"/>
+      <point x="525" y="576"/>
+      <point x="454" y="645"/>
+      <point x="454" y="745" type="curve" smooth="yes"/>
+      <point x="454" y="845"/>
+      <point x="525" y="914"/>
+      <point x="616" y="914" type="curve" smooth="yes"/>
+      <point x="707" y="914"/>
+      <point x="778" y="845"/>
+      <point x="778" y="745" type="curve" smooth="yes"/>
+      <point x="778" y="645"/>
+      <point x="707" y="576"/>
+    </contour>
+  </outline>
+  <lib>
+    <dict>
+      <key>com.schriftgestaltung.Glyphs.lastChange</key>
+      <string>2017-07-11 17:15:08 +0000</string>
+      <key>com.typemytype.robofont.guides</key>
+      <array>
+        <dict>
+          <key>angle</key>
+          <integer>0</integer>
+          <key>isGlobal</key>
+          <false/>
+          <key>magnetic</key>
+          <integer>5</integer>
+          <key>x</key>
+          <integer>0</integer>
+          <key>y</key>
+          <integer>2048</integer>
+        </dict>
+        <dict>
+          <key>angle</key>
+          <integer>0</integer>
+          <key>isGlobal</key>
+          <false/>
+          <key>magnetic</key>
+          <integer>5</integer>
+          <key>x</key>
+          <integer>0</integer>
+          <key>y</key>
+          <integer>2048</integer>
+        </dict>
+      </array>
+    </dict>
+  </lib>
+</glyph>

source/Hack-BoldItalic.ufo/lib.plist

@@ -757,6 +757,7 @@
 		<string>perthousand</string>
 		<string>plus</string>
 		<string>plusminus</string>
+		<string>periodcentered</string>
 		<string>product</string>
 		<string>propersubset</string>
 		<string>propersuperset</string>