Update Squawk to fix crash (#2040)

Author: rnystrom

Podfile.lock

@@ -196,7 +196,7 @@ CHECKOUT OPTIONS:
     :commit: ca6935cf8fc779aedd20e46c9a8b3bb3733e0ee7
     :git: https://github.com/GitHawkApp/MessageViewController.git
   Squawk:
-    :commit: 399ae714ecd69ebf60ca5f4e2ff7822e21b91586
+    :commit: 88d671bbe86e3c18d54e094fac97df12a3054d53
     :git: https://github.com/GitHawkApp/Squawk.git
   StyledTextKit:
     :commit: d15f77a32203daafd71e14e6f5911528e932aca5

Pods/Manifest.lock

@@ -32,7 +32,7 @@
 			<key>File</key>
 			<string>com.mono0926.LicensePlist/AutoInsetter</string>
 			<key>Title</key>
-			<string>AutoInsetter (1.2.3)</string>
+			<string>AutoInsetter (1.2.5)</string>
 			<key>Type</key>
 			<string>PSChildPaneSpecifier</string>
 		</dict>
@@ -208,7 +208,7 @@
 			<key>File</key>
 			<string>com.mono0926.LicensePlist/Pageboy</string>
 			<key>Title</key>
-			<string>Pageboy (2.5.1)</string>
+			<string>Pageboy (2.5.4)</string>
 			<key>Type</key>
 			<string>PSChildPaneSpecifier</string>
 		</dict>
@@ -264,7 +264,7 @@
 			<key>File</key>
 			<string>com.mono0926.LicensePlist/Tabman</string>
 			<key>Title</key>
-			<string>Tabman (1.8.2)</string>
+			<string>Tabman (1.9.2)</string>
 			<key>Type</key>
 			<string>PSChildPaneSpecifier</string>
 		</dict>