align types between sqlite & postgres

use DATETIME for SQLite's time type. This way, Diesel picks up on what
it's supposed to be.

migrations/sqlite/2018-04-22-093322_create_instances/up.sql

@@ -5,7 +5,7 @@ CREATE TABLE instances (
     name VARCHAR NOT NULL,
     local BOOLEAN NOT NULL DEFAULT 'f',
     blocked BOOLEAN NOT NULL DEFAULT 'f',
-    creation_date INTEGER NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
     open_registrations BOOLEAN NOT NULL DEFAULT 't',
     short_description TEXT NOT NULL DEFAULT '',
     long_description TEXT NOT NULL DEFAULT '',

migrations/sqlite/2018-04-22-151330_create_user/up.sql

@@ -11,7 +11,7 @@ CREATE TABLE users (
     email TEXT,
     hashed_password TEXT,
     instance_id INTEGER REFERENCES instances(id) ON DELETE CASCADE NOT NULL,
-    creation_date INTEGER NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
     ap_url TEXT NOT NULL default '',
     private_key TEXT,
     public_key TEXT NOT NULL DEFAULT '',

migrations/sqlite/2018-04-23-101717_create_blogs/up.sql

@@ -7,7 +7,7 @@ CREATE TABLE blogs (
     outbox_url VARCHAR NOT NULL,
     inbox_url VARCHAR NOT NULL,
     instance_id INTEGER REFERENCES instances(id) ON DELETE CASCADE NOT NULL,
-    creation_date INTEGER NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
     ap_url text not null default '',
     private_key TEXT,
     public_key TEXT NOT NULL DEFAULT ''

migrations/sqlite/2018-04-23-132822_create_posts/up.sql

@@ -7,7 +7,7 @@ CREATE TABLE posts (
     content TEXT NOT NULL DEFAULT '',
     published BOOLEAN NOT NULL DEFAULT 'f',
     license VARCHAR NOT NULL DEFAULT 'CC-0',
-    creation_date INTEGER NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
     ap_url VARCHAR NOT NULL DEFAULT '',
     subtitle TEXT NOT NULL DEFAULT '',
     source TEXT NOT NULL DEFAULT ''

migrations/sqlite/2018-05-09-192013_create_comments/up.sql

@@ -5,7 +5,7 @@ CREATE TABLE comments (
     in_response_to_id INTEGER REFERENCES comments(id),    
     post_id INTEGER REFERENCES posts(id) ON DELETE CASCADE NOT NULL,
     author_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
-    creation_date INTEGER NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
     ap_url VARCHAR,
     sensitive BOOLEAN NOT NULL DEFAULT 'f',
     spoiler_text TEXT NOT NULL DEFAULT ''

migrations/sqlite/2018-05-10-154336_create_likes/up.sql

@@ -4,5 +4,5 @@ CREATE TABLE likes (
     user_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
     post_id INTEGER REFERENCES posts(id) ON DELETE CASCADE NOT NULL,
     ap_url VARCHAR NOT NULL default '',
-    creation_date INTEGER NOT NULL DEFAULT CURRENT_TIMESTAMP
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
 )

migrations/sqlite/2018-05-13-122311_create_notifications/up.sql

@@ -2,7 +2,7 @@
 CREATE TABLE notifications (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     user_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
-    creation_date INTEGER NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
     kind VARCHAR NOT NULL DEFAULT 'unknown',
     object_id INTEGER NOT NULL DEFAULT 0
 )

migrations/sqlite/2018-05-19-091428_create_reshares/up.sql

@@ -4,5 +4,5 @@ CREATE TABLE reshares (
     user_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
     post_id INTEGER REFERENCES posts(id) ON DELETE CASCADE NOT NULL,
     ap_url VARCHAR NOT NULL DEFAULT '',
-    creation_date INTEGER NOT NULL DEFAULT CURRENT_TIMESTAMP
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
 )