deps: Upgrade packages within constraints (flutter pub upgrade)

There are currently no upgrades that `--major-versions` would add
beyond these.

This includes the results of doing a build for iOS and for macOS;
the iOS Podfile.lock takes an update.

For the changes in lib/ and test/, see Greg's analysis here:
  #316 (comment)

Author: chrisbobbe

ios/Podfile.lock

@@ -1,5 +1,5 @@
 PODS:
-  - app_settings (4.3.0):
+  - app_settings (5.1.1):
     - Flutter
   - device_info_plus (0.0.1):
     - Flutter
@@ -50,18 +50,18 @@ PODS:
   - SDWebImage/Core (5.15.5)
   - share_plus (0.0.1):
     - Flutter
-  - sqlite3 (3.41.2):
-    - sqlite3/common (= 3.41.2)
-  - sqlite3/common (3.41.2)
-  - sqlite3/fts5 (3.41.2):
+  - sqlite3 (3.43.1):
+    - sqlite3/common (= 3.43.1)
+  - sqlite3/common (3.43.1)
+  - sqlite3/fts5 (3.43.1):
     - sqlite3/common
-  - sqlite3/perf-threadsafe (3.41.2):
+  - sqlite3/perf-threadsafe (3.43.1):
     - sqlite3/common
-  - sqlite3/rtree (3.41.2):
+  - sqlite3/rtree (3.43.1):
     - sqlite3/common
   - sqlite3_flutter_libs (0.0.1):
     - Flutter
-    - sqlite3 (~> 3.41.2)
+    - sqlite3 (~> 3.43.1)
     - sqlite3/fts5
     - sqlite3/perf-threadsafe
     - sqlite3/rtree
@@ -112,7 +112,7 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/url_launcher_ios/ios"
 
 SPEC CHECKSUMS:
-  app_settings: ee4ae4d1c9a907a23b81c40e5c56a5ca8a20a62b
+  app_settings: 017320c6a680cdc94c799949d95b84cb69389ebc
   device_info_plus: 7545d84d8d1b896cb16a4ff98c19f07ec4b298ea
   DKImagePickerController: b512c28220a2b8ac7419f21c491fc8534b7601ac
   DKPhotoGallery: fdfad5125a9fdda9cc57df834d49df790dbb4179
@@ -123,8 +123,8 @@ SPEC CHECKSUMS:
   path_provider_foundation: 29f094ae23ebbca9d3d0cec13889cd9060c0e943
   SDWebImage: fd7e1a22f00303e058058278639bf6196ee431fe
   share_plus: 599aa54e4ea31d4b4c0e9c911bcc26c55e791028
-  sqlite3: fd89671d969f3e73efe503ce203e28b016b58f68
-  sqlite3_flutter_libs: 04ba0d14a04335a2fbf9a331e8664f401fbccdd5
+  sqlite3: e0a0623a33a20a47cb5921552aebc6e9e437dc91
+  sqlite3_flutter_libs: 0d61e18fab1bed977dbd2d2fc76a726044ca00e7
   SwiftyGif: 93a1cc87bf3a51916001cf8f3d63835fb64c819f
   url_launcher_ios: 08a3dfac5fb39e8759aeb0abbd5d9480f30fc8b4